diff --git a/WORKSPACE b/WORKSPACE
index 0d9b06a..6c01d03 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -976,197 +976,6 @@
     yarn_lock = "//:plugins/yarn.lock",
 )
 
-load("//tools/bzl:js.bzl", "bower_archive", "npm_binary")
-
-# NPM binaries bundled along with their dependencies.
-#
-# For full instructions on adding new binaries to the build, see
-# http://gerrit-review.googlesource.com/Documentation/dev-bazel.html#npm-binary
-npm_binary(
-    name = "bower",
-)
-
-npm_binary(
-    name = "polymer-bundler",
-    repository = GERRIT,
-)
-
-npm_binary(
-    name = "crisper",
-    repository = GERRIT,
-)
-
-# bower_archive() seed components.
-bower_archive(
-    name = "iron-autogrow-textarea",
-    package = "polymerelements/iron-autogrow-textarea",
-    sha1 = "2f04c7e2a72d462de36093ab2b4889db20f699f6",
-    version = "2.2.0",
-)
-
-bower_archive(
-    name = "es6-promise",
-    package = "stefanpenner/es6-promise",
-    sha1 = "a3a797bb22132f1ef75f9a2556173f81870c2e53",
-    version = "3.3.0",
-)
-
-bower_archive(
-    name = "fetch",
-    package = "fetch",
-    sha1 = "1b05a2bb40c73232c2909dc196de7519fe4db7a9",
-    version = "1.0.0",
-)
-
-bower_archive(
-    name = "iron-dropdown",
-    package = "polymerelements/iron-dropdown",
-    sha1 = "3902ba164552b1bfc59e6fa692efa4a1fd8dd4ea",
-    version = "2.2.1",
-)
-
-bower_archive(
-    name = "iron-input",
-    package = "polymerelements/iron-input",
-    sha1 = "f79952ff4f6f103c0a2cbd3dacf25935257ff392",
-    version = "2.1.3",
-)
-
-bower_archive(
-    name = "iron-overlay-behavior",
-    package = "polymerelements/iron-overlay-behavior",
-    sha1 = "c2d2eac1b162420d9475ade2f16d5db8959b93fc",
-    version = "2.3.4",
-)
-
-bower_archive(
-    name = "iron-selector",
-    package = "polymerelements/iron-selector",
-    sha1 = "3f3fcb55f6bd606ea493f99eab9daae21f7a6139",
-    version = "2.1.0",
-)
-
-bower_archive(
-    name = "paper-button",
-    package = "polymerelements/paper-button",
-    sha1 = "bcb783d74e1177c1d0836340e7c0280699d1438c",
-    version = "2.1.3",
-)
-
-bower_archive(
-    name = "paper-input",
-    package = "polymerelements/paper-input",
-    sha1 = "c1a81a4173d22e72e8ab609eb3715a75273396b3",
-    version = "2.2.3",
-)
-
-bower_archive(
-    name = "paper-tabs",
-    package = "polymerelements/paper-tabs",
-    sha1 = "589b8e6efa0f171c93233137c8ea013dcea0ffc7",
-    version = "2.1.1",
-)
-
-bower_archive(
-    name = "iron-icon",
-    package = "polymerelements/iron-icon",
-    sha1 = "d21e7d4f1bdc6de881390f888e28d53155eeb551",
-    version = "2.1.0",
-)
-
-bower_archive(
-    name = "iron-iconset-svg",
-    package = "polymerelements/iron-iconset-svg",
-    sha1 = "07c0ce02ce6479856758893416a3709009db7f22",
-    version = "2.2.1",
-)
-
-bower_archive(
-    name = "moment",
-    package = "moment/moment",
-    sha1 = "fc8ce2c799bab21f6ced7aff928244f4ca8880aa",
-    version = "2.13.0",
-)
-
-bower_archive(
-    name = "page",
-    package = "visionmedia/page.js",
-    sha1 = "4a31889cd75cc5e7f68a4c7f256eecaf27102eee",
-    version = "1.11.4",
-)
-
-bower_archive(
-    name = "paper-item",
-    package = "polymerelements/paper-item",
-    sha1 = "c3bad022cf182d2bf1c8a44374c7fcb1409afbfa",
-    version = "2.1.1",
-)
-
-bower_archive(
-    name = "paper-listbox",
-    package = "polymerelements/paper-listbox",
-    sha1 = "78247cc32bb776f204efef17cff3095878036a40",
-    version = "2.1.1",
-)
-
-bower_archive(
-    name = "paper-toggle-button",
-    package = "polymerelements/paper-toggle-button",
-    sha1 = "9927960afb0062726ec1b585ef3e32764c3bbac9",
-    version = "2.1.1",
-)
-
-bower_archive(
-    name = "polymer",
-    package = "polymer/polymer",
-    sha1 = "d06e17a1d8dc6187ee5aa8c5b3501da10901c82f",
-    version = "2.7.2",
-)
-
-bower_archive(
-    name = "polymer-resin",
-    package = "polymer/polymer-resin",
-    sha1 = "94c29926c20ea3a9b636f26b3e0d689ead8137e5",
-    version = "2.0.1",
-)
-
-bower_archive(
-    name = "resemblejs",
-    package = "rsmbl/Resemble.js",
-    sha1 = "49d5f022417c389b630d6f7ee667aa9540075c42",
-    version = "2.10.1",
-)
-
-bower_archive(
-    name = "codemirror-minified",
-    package = "Dominator008/codemirror-minified",
-    sha1 = "a1ddf3a6dcc6817597eacc52688cfe5083ded4cd",
-    version = "5.59.1",
-)
-
-# bower test stuff
-
-bower_archive(
-    name = "iron-test-helpers",
-    package = "polymerelements/iron-test-helpers",
-    sha1 = "882be2d4c8714b39299b5f7bf25253c4e8a40761",
-    version = "2.0.1",
-)
-
-bower_archive(
-    name = "test-fixture",
-    package = "polymerelements/test-fixture",
-    sha1 = "7d72ddfebf555a2dd1fc60a85427d9026b509723",
-    version = "3.0.0",
-)
-
-bower_archive(
-    name = "web-component-tester",
-    package = "polymer/web-component-tester",
-    sha1 = "d84f6a13bde5f8fd39ee208d43f33925410530d7",
-    version = "6.5.1",
-)
-
 external_plugin_deps()
 
 # When upgrading elasticsearch-rest-client, also upgrade httpcore-nio
diff --git a/lib/LICENSE-codemirror-minified b/lib/LICENSE-codemirror-minified
deleted file mode 100644
index 89f23625..0000000
--- a/lib/LICENSE-codemirror-minified
+++ /dev/null
@@ -1,22 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2016 Marijn Haverbeke <marijnh@gmail.com> and others
-Copyright (c) 2016 Michael Zhou <zhoumotongxue008@gmail.com>
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/lib/LICENSE-resemblejs b/lib/LICENSE-resemblejs
deleted file mode 100644
index b265c8a..0000000
--- a/lib/LICENSE-resemblejs
+++ /dev/null
@@ -1,18 +0,0 @@
-The MIT License (MIT) Copyright © 2013 Huddle
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the “Software”), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/lib/js/BUILD b/lib/js/BUILD
index 106aabb..82089bd 100644
--- a/lib/js/BUILD
+++ b/lib/js/BUILD
@@ -1,4 +1,4 @@
-load("//tools/bzl:js.bzl", "bower_component", "js_component")
+load("//tools/bzl:js.bzl", "js_component")
 
 package(default_visibility = ["//visibility:public"])
 
@@ -22,15 +22,3 @@
     srcs = ["//lib/ba-linkify:ba-linkify.js"],
     license = "//lib:LICENSE-ba-linkify",
 )
-
-##TODO: remove after plugins migration to npm
-bower_component(
-    name = "codemirror-minified",
-    license = "//lib:LICENSE-codemirror-minified",
-)
-
-bower_component(
-    name = "resemblejs",
-    license = "//lib:LICENSE-resemblejs",
-)
-#End of removal
diff --git a/lib/js/npm.bzl b/lib/js/npm.bzl
deleted file mode 100644
index 5a6a8c0..0000000
--- a/lib/js/npm.bzl
+++ /dev/null
@@ -1,11 +0,0 @@
-NPM_VERSIONS = {
-    "bower": "1.8.8",
-    "crisper": "2.0.2",
-    "polymer-bundler": "4.0.9",
-}
-
-NPM_SHA1S = {
-    "bower": "82544be34a33aeae7efb8bdf9905247b2cffa985",
-    "crisper": "7183c58cea33632fb036c91cefd1b43e390d22a2",
-    "polymer-bundler": "c80c9815690d76656d1fa6a231481850b4fa3874",
-}
diff --git a/plugins/codemirror-editor b/plugins/codemirror-editor
index 7c94eb2..42d5fe0 160000
--- a/plugins/codemirror-editor
+++ b/plugins/codemirror-editor
@@ -1 +1 @@
-Subproject commit 7c94eb2fd3cdea33a200ae7c73c19777ca865a41
+Subproject commit 42d5fe041ee2ef6be579c0085396fa5e60889222
diff --git a/tools/bzl/js.bzl b/tools/bzl/js.bzl
index b09454c..7c63cc3 100644
--- a/tools/bzl/js.bzl
+++ b/tools/bzl/js.bzl
@@ -1,167 +1,9 @@
 load("@npm//@bazel/rollup:index.bzl", "rollup_bundle")
 load("@npm//@bazel/terser:index.bzl", "terser_minified")
-load("//lib/js:npm.bzl", "NPM_SHA1S", "NPM_VERSIONS")
 load("//tools/bzl:genrule2.bzl", "genrule2")
 
-NPMJS = "NPMJS"
-
-GERRIT = "GERRIT:"
-
-def _npm_tarball(name):
-    return "%s@%s.npm_binary.tgz" % (name, NPM_VERSIONS[name])
-
-def _npm_binary_impl(ctx):
-    """rule to download a NPM archive."""
-    name = ctx.name
-    version = NPM_VERSIONS[name]
-    sha1 = NPM_SHA1S[name]
-
-    dir = "%s-%s" % (name, version)
-    filename = "%s.tgz" % dir
-    base = "%s@%s.npm_binary.tgz" % (name, version)
-    dest = ctx.path(base)
-    repository = ctx.attr.repository
-    if repository == GERRIT:
-        url = "https://gerrit-maven.storage.googleapis.com/npm-packages/%s" % filename
-    elif repository == NPMJS:
-        url = "https://registry.npmjs.org/%s/-/%s" % (name, filename)
-    else:
-        fail("repository %s not in {%s,%s}" % (repository, GERRIT, NPMJS))
-
-    python = ctx.which("python3")
-    script = ctx.path(ctx.attr._download_script)
-
-    args = [python, script, "-o", dest, "-u", url, "-v", sha1]
-    out = ctx.execute(args)
-    if out.return_code:
-        fail("failed %s: %s" % (args, out.stderr))
-    ctx.file("BUILD", "package(default_visibility=['//visibility:public'])\nfilegroup(name='tarball', srcs=['%s'])" % base, False)
-
-npm_binary = repository_rule(
-    attrs = {
-        "repository": attr.string(default = NPMJS),
-        # Label resolves within repo of the .bzl file.
-        "_download_script": attr.label(default = Label("//tools:download_file.py")),
-    },
-    local = True,
-    implementation = _npm_binary_impl,
-)
-
 ComponentInfo = provider()
 
-# for use in repo rules.
-def _run_npm_binary_str(ctx, tarball, args):
-    python_bin = ctx.which("python3")
-    return " ".join([
-        str(python_bin),
-        str(ctx.path(ctx.attr._run_npm)),
-        str(ctx.path(tarball)),
-    ] + args)
-
-def _bower_archive(ctx):
-    """Download a bower package."""
-    download_name = "%s__download_bower.zip" % ctx.name
-    renamed_name = "%s__renamed.zip" % ctx.name
-    version_name = "%s__version.json" % ctx.name
-
-    cmd = [
-        ctx.which("python3"),
-        ctx.path(ctx.attr._download_bower),
-        "-b",
-        "%s" % _run_npm_binary_str(ctx, ctx.attr._bower_archive, []),
-        "-n",
-        ctx.name,
-        "-p",
-        ctx.attr.package,
-        "-v",
-        ctx.attr.version,
-        "-s",
-        ctx.attr.sha1,
-        "-o",
-        download_name,
-    ]
-
-    out = ctx.execute(cmd)
-    if out.return_code:
-        fail("failed %s: %s" % (cmd, out.stderr))
-
-    _bash(ctx, " && ".join([
-        "TMP=$(mktemp -d || mktemp -d -t bazel-tmp)",
-        "TZ=UTC",
-        "export UTC",
-        "cd $TMP",
-        "mkdir bower_components",
-        "cd bower_components",
-        "unzip %s" % ctx.path(download_name),
-        "cd ..",
-        "find . -exec touch -t 198001010000 '{}' ';'",
-        "zip -Xr %s bower_components" % renamed_name,
-        "cd ..",
-        "rm -rf ${TMP}",
-    ]))
-
-    dep_version = ctx.attr.semver if ctx.attr.semver else ctx.attr.version
-    ctx.file(
-        version_name,
-        '"%s":"%s#%s"' % (ctx.name, ctx.attr.package, dep_version),
-    )
-    ctx.file(
-        "BUILD",
-        "\n".join([
-            "package(default_visibility=['//visibility:public'])",
-            "filegroup(name = 'zipfile', srcs = ['%s'], )" % download_name,
-            "filegroup(name = 'version_json', srcs = ['%s'], visibility=['//visibility:public'])" % version_name,
-        ]),
-        False,
-    )
-
-def _bash(ctx, cmd):
-    cmd_list = ["bash", "-c", cmd]
-    out = ctx.execute(cmd_list)
-    if out.return_code:
-        fail("failed %s: %s" % (cmd_list, out.stderr))
-
-bower_archive = repository_rule(
-    _bower_archive,
-    attrs = {
-        "package": attr.string(mandatory = True),
-        "semver": attr.string(),
-        "sha1": attr.string(mandatory = True),
-        "version": attr.string(mandatory = True),
-        "_bower_archive": attr.label(default = Label("@bower//:%s" % _npm_tarball("bower"))),
-        "_download_bower": attr.label(default = Label("//tools/js:download_bower.py")),
-        "_run_npm": attr.label(default = Label("//tools/js:run_npm_binary.py")),
-    },
-)
-
-def _bower_component_impl(ctx):
-    transitive_zipfiles = depset(
-        direct = [ctx.file.zipfile],
-        transitive = [d[ComponentInfo].transitive_zipfiles for d in ctx.attr.deps],
-    )
-
-    transitive_licenses = depset(
-        direct = [ctx.file.license],
-        transitive = [d[ComponentInfo].transitive_licenses for d in ctx.attr.deps],
-    )
-
-    transitive_versions = depset(
-        direct = ctx.files.version_json,
-        transitive = [d[ComponentInfo].transitive_versions for d in ctx.attr.deps],
-    )
-
-    return [
-        ComponentInfo(
-            transitive_licenses = transitive_licenses,
-            transitive_versions = transitive_versions,
-            transitive_zipfiles = transitive_zipfiles,
-        ),
-    ]
-
-_common_attrs = {
-    "deps": attr.label_list(providers = [ComponentInfo]),
-}
-
 def _js_component(ctx):
     dir = ctx.outputs.zip.path + ".dir"
     name = ctx.outputs.zip.basename
@@ -182,7 +24,7 @@
         inputs = ctx.files.srcs,
         outputs = [ctx.outputs.zip],
         command = cmd,
-        mnemonic = "GenBowerZip",
+        mnemonic = "GenJsComponentZip",
     )
 
     licenses = []
@@ -199,248 +41,15 @@
 
 js_component = rule(
     _js_component,
-    attrs = dict(_common_attrs.items() + {
+    attrs = {
         "srcs": attr.label_list(allow_files = [".js"]),
         "license": attr.label(allow_single_file = True),
-    }.items()),
+    },
     outputs = {
         "zip": "%{name}.zip",
     },
 )
 
-_bower_component = rule(
-    _bower_component_impl,
-    attrs = dict(_common_attrs.items() + {
-        "license": attr.label(allow_single_file = True),
-
-        # If set, define by hand, and don't regenerate this entry in bower2bazel.
-        "seed": attr.bool(default = False),
-        "version_json": attr.label(allow_files = [".json"]),
-        "zipfile": attr.label(allow_single_file = [".zip"]),
-    }.items()),
-)
-
-# TODO(hanwen): make license mandatory.
-def bower_component(name, license = None, **kwargs):
-    prefix = "//lib:LICENSE-"
-    if license and not license.startswith(prefix):
-        license = prefix + license
-    _bower_component(
-        name = name,
-        license = license,
-        zipfile = "@%s//:zipfile" % name,
-        version_json = "@%s//:version_json" % name,
-        **kwargs
-    )
-
-def _bower_component_bundle_impl(ctx):
-    """A bunch of bower components zipped up."""
-    zips = depset()
-    for d in ctx.attr.deps:
-        files = d[ComponentInfo].transitive_zipfiles
-
-        # TODO(davido): Make sure the field always contains a depset
-        if type(files) == "list":
-            files = depset(files)
-        zips = depset(transitive = [zips, files])
-
-    versions = depset(transitive = [d[ComponentInfo].transitive_versions for d in ctx.attr.deps])
-
-    licenses = depset(transitive = [d[ComponentInfo].transitive_versions for d in ctx.attr.deps])
-
-    out_zip = ctx.outputs.zip
-    out_versions = ctx.outputs.version_json
-
-    ctx.actions.run_shell(
-        inputs = zips.to_list(),
-        outputs = [out_zip],
-        command = " && ".join([
-            "p=$PWD",
-            "TZ=UTC",
-            "export TZ",
-            "rm -rf %s.dir" % out_zip.path,
-            "mkdir -p %s.dir/bower_components" % out_zip.path,
-            "cd %s.dir/bower_components" % out_zip.path,
-            "for z in %s; do unzip -q $p/$z ; done" % " ".join(sorted([z.path for z in zips.to_list()])),
-            "cd ..",
-            "find . -exec touch -t 198001010000 '{}' ';'",
-            "zip -Xqr $p/%s bower_components/*" % out_zip.path,
-        ]),
-        mnemonic = "BowerCombine",
-    )
-
-    ctx.actions.run_shell(
-        inputs = versions.to_list(),
-        outputs = [out_versions],
-        mnemonic = "BowerVersions",
-        command = "(echo '{' ; for j in  %s ; do cat $j; echo ',' ; done ; echo \\\"\\\":\\\"\\\"; echo '}') > %s" % (" ".join([v.path for v in versions.to_list()]), out_versions.path),
-    )
-
-    return [
-        ComponentInfo(
-            transitive_licenses = licenses,
-            transitive_versions = versions,
-            transitive_zipfiles = zips,
-        ),
-    ]
-
-bower_component_bundle = rule(
-    _bower_component_bundle_impl,
-    attrs = _common_attrs,
-    outputs = {
-        "version_json": "%{name}-versions.json",
-        "zip": "%{name}.zip",
-    },
-)
-
-def _bundle_impl(ctx):
-    """Groups a set of .html and .js together in a zip file.
-
-    Outputs:
-      NAME-versions.json:
-        a JSON file containing a PKG-NAME => PKG-NAME#VERSION mapping for the
-        transitive dependencies.
-    NAME.zip:
-      a zip file containing the transitive dependencies for this bundle.
-    """
-
-    # intermediate artifact if split is wanted.
-    if ctx.attr.split:
-        bundled = ctx.actions.declare_file(ctx.outputs.html.path + ".bundled.html")
-    else:
-        bundled = ctx.outputs.html
-    destdir = ctx.outputs.html.path + ".dir"
-    zips = [z for d in ctx.attr.deps for z in d[ComponentInfo].transitive_zipfiles.to_list()]
-
-    # We are splitting off the package dir from the app.path such that
-    # we can set the package dir as the root for the bundler, which means
-    # that absolute imports are interpreted relative to that root.
-    pkg_dir = ctx.attr.pkg.lstrip("/")
-    app_path = ctx.file.app.path
-    app_path = app_path[app_path.index(pkg_dir) + len(pkg_dir):]
-
-    hermetic_npm_binary = " ".join([
-        "python3",
-        "$p/" + ctx.file._run_npm.path,
-        "$p/" + ctx.file._bundler_archive.path,
-        "--inline-scripts",
-        "--inline-css",
-        "--sourcemaps",
-        "--strip-comments",
-        "--out-file",
-        "$p/" + bundled.path,
-        "--root",
-        pkg_dir,
-        app_path,
-    ])
-
-    cmd = " && ".join([
-        # unpack dependencies.
-        "export PATH",
-        "p=$PWD",
-        "rm -rf %s" % destdir,
-        "mkdir -p %s/%s/bower_components" % (destdir, pkg_dir),
-        "for z in %s; do unzip -qd %s/%s/bower_components/ $z; done" % (
-            " ".join([z.path for z in zips]),
-            destdir,
-            pkg_dir,
-        ),
-        "tar -cf - %s | tar -C %s -xf -" % (" ".join([s.path for s in ctx.files.srcs]), destdir),
-        "cd %s" % destdir,
-        hermetic_npm_binary,
-    ])
-
-    # Node/NPM is not (yet) hermeticized, so we have to get the binary
-    # from the environment, and it may be under $HOME, so we can't run
-    # in the sandbox.
-    node_tweaks = dict(
-        execution_requirements = {"local": "1"},
-        use_default_shell_env = True,
-    )
-    ctx.actions.run_shell(
-        mnemonic = "Bundle",
-        inputs = [
-            ctx.file._run_npm,
-            ctx.file.app,
-            ctx.file._bundler_archive,
-        ] + list(zips) + ctx.files.srcs,
-        outputs = [bundled],
-        command = cmd,
-        **node_tweaks
-    )
-
-    if ctx.attr.split:
-        hermetic_npm_command = "export PATH && " + " ".join([
-            "python3",
-            ctx.file._run_npm.path,
-            ctx.file._crisper_archive.path,
-            "--script-in-head=false",
-            "--always-write-script",
-            "--source",
-            bundled.path,
-            "--html",
-            ctx.outputs.html.path,
-            "--js",
-            ctx.outputs.js.path,
-        ])
-
-        ctx.actions.run_shell(
-            mnemonic = "Crisper",
-            inputs = [
-                ctx.file._run_npm,
-                ctx.file.app,
-                ctx.file._crisper_archive,
-                bundled,
-            ],
-            outputs = [ctx.outputs.js, ctx.outputs.html],
-            command = hermetic_npm_command,
-            **node_tweaks
-        )
-
-def _bundle_output_func(name, split):
-    _ignore = [name]  # unused.
-    out = {"html": "%{name}.html"}
-    if split:
-        out["js"] = "%{name}.js"
-    return out
-
-_bundle_rule = rule(
-    _bundle_impl,
-    attrs = {
-        "srcs": attr.label_list(allow_files = [
-            ".js",
-            ".html",
-            ".txt",
-            ".css",
-            ".ico",
-        ]),
-        "app": attr.label(
-            mandatory = True,
-            allow_single_file = True,
-        ),
-        "pkg": attr.string(mandatory = True),
-        "split": attr.bool(default = True),
-        "deps": attr.label_list(providers = [ComponentInfo]),
-        "_bundler_archive": attr.label(
-            default = Label("@polymer-bundler//:%s" % _npm_tarball("polymer-bundler")),
-            allow_single_file = True,
-        ),
-        "_crisper_archive": attr.label(
-            default = Label("@crisper//:%s" % _npm_tarball("crisper")),
-            allow_single_file = True,
-        ),
-        "_run_npm": attr.label(
-            default = Label("//tools/js:run_npm_binary.py"),
-            allow_single_file = True,
-        ),
-    },
-    outputs = _bundle_output_func,
-)
-
-def bundle_assets(*args, **kwargs):
-    """Combine html, js, css files and optionally split into js and html bundles."""
-    _bundle_rule(pkg = native.package_name(), *args, **kwargs)
-
 def polygerrit_plugin(name, app, plugin_name = None):
     """Produces plugin file set with minified javascript.
 
diff --git a/tools/js/BUILD b/tools/js/BUILD
index 1a272e2..d696496 100644
--- a/tools/js/BUILD
+++ b/tools/js/BUILD
@@ -1 +1 @@
-exports_files(["run_npm_binary.py", "eslint-chdir.js"])
+exports_files(["eslint-chdir.js"])
diff --git a/tools/js/bowerutil.py b/tools/js/bowerutil.py
deleted file mode 100644
index 9fb82af..0000000
--- a/tools/js/bowerutil.py
+++ /dev/null
@@ -1,46 +0,0 @@
-# Copyright (C) 2013 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-import os
-
-
-def hash_bower_component(hash_obj, path):
-    """Hash the contents of a bower component directory.
-
-    This is a stable hash of a directory downloaded with `bower install`, minus
-    the .bower.json file, which is autogenerated each time by bower. Used in
-    lieu of hashing a zipfile of the contents, since zipfiles are difficult to
-    hash in a stable manner.
-
-    Args:
-      hash_obj: an open hash object, e.g. hashlib.sha1().
-      path: path to the directory to hash.
-
-    Returns:
-      The passed-in hash_obj.
-    """
-    if not os.path.isdir(path):
-        raise ValueError('Not a directory: %s' % path)
-
-    path = os.path.abspath(path)
-    for root, dirs, files in os.walk(path):
-        dirs.sort()
-        for f in sorted(files):
-            if f == '.bower.json':
-                continue
-            p = os.path.join(root, f)
-            hash_obj.update(p[len(path)+1:].encode("utf-8"))
-            hash_obj.update(open(p, "rb").read())
-
-    return hash_obj
diff --git a/tools/js/download_bower.py b/tools/js/download_bower.py
deleted file mode 100755
index 7cf40e1..0000000
--- a/tools/js/download_bower.py
+++ /dev/null
@@ -1,135 +0,0 @@
-#!/usr/bin/env python3
-# Copyright (C) 2015 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from __future__ import print_function
-
-import argparse
-import hashlib
-import json
-import os
-import shutil
-import subprocess
-import sys
-
-import bowerutil
-
-CACHE_DIR = os.path.expanduser(os.path.join(
-    '~', '.gerritcodereview', 'bazel-cache', 'downloaded-artifacts'))
-
-
-def bower_cmd(bower, *args):
-    cmd = bower.split(' ')
-    cmd.extend(args)
-    return cmd
-
-
-def bower_info(bower, name, package, version):
-    cmd = bower_cmd(bower, '-l=error', '-j',
-                    'info', '%s#%s' % (package, version))
-    try:
-        p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
-                             stderr=subprocess.PIPE)
-    except:
-        sys.stderr.write("error executing: %s\n" % ' '.join(cmd))
-        raise
-    out, err = p.communicate()
-    if p.returncode:
-        # For python3 support we wrap str around err.
-        sys.stderr.write(str(err))
-        raise OSError('Command failed: %s' % ' '.join(cmd))
-
-    try:
-        info = json.loads(out)
-    except ValueError:
-        raise ValueError('invalid JSON from %s:\n%s' % (" ".join(cmd), out))
-    info_name = info.get('name')
-    if info_name != name:
-        raise ValueError(
-            'expected package name %s, got: %s' % (name, info_name))
-    return info
-
-
-def ignore_deps(info):
-    # Tell bower to ignore dependencies so we just download this component.
-    # This is just an optimization, since we only pick out the component we
-    # need, but it's important when downloading sizable dependency trees.
-    #
-    # As of 1.6.5 I don't think ignoredDependencies can be specified on the
-    # command line with --config, so we have to create .bowerrc.
-    deps = info.get('dependencies')
-    if deps:
-        with open(os.path.join('.bowerrc'), 'w') as f:
-            json.dump({'ignoredDependencies': list(deps.keys())}, f)
-
-
-def cache_entry(name, package, version, sha1):
-    if not sha1:
-        sha1 = hashlib.sha1('%s#%s' % (package, version)).hexdigest()
-    return os.path.join(CACHE_DIR, '%s-%s.zip-%s' % (name, version, sha1))
-
-
-def main():
-    parser = argparse.ArgumentParser()
-    parser.add_argument('-n', help='short name of component')
-    parser.add_argument('-b', help='bower command')
-    parser.add_argument('-p', help='full package name of component')
-    parser.add_argument('-v', help='version number')
-    parser.add_argument('-s', help='expected content sha1')
-    parser.add_argument('-o', help='output file location')
-    args = parser.parse_args()
-
-    assert args.p
-    assert args.v
-    assert args.n
-
-    cwd = os.getcwd()
-    outzip = os.path.join(cwd, args.o)
-    cached = cache_entry(args.n, args.p, args.v, args.s)
-
-    if not os.path.exists(cached):
-        info = bower_info(args.b, args.n, args.p, args.v)
-        ignore_deps(info)
-        subprocess.check_call(
-            bower_cmd(
-                args.b, '--quiet', 'install', '%s#%s' % (args.p, args.v)))
-        bc = os.path.join(cwd, 'bower_components')
-        subprocess.check_call(
-            ['zip', '-q', '--exclude', '.bower.json', '-r', cached, args.n],
-            cwd=bc)
-
-        if args.s:
-            path = os.path.join(bc, args.n)
-            sha1 = bowerutil.hash_bower_component(
-                hashlib.sha1(), path).hexdigest()
-            if args.s != sha1:
-                print((
-                    '%s#%s:\n'
-                    'expected %s\n'
-                    'received %s\n') % (args.p, args.v, args.s, sha1),
-                    file=sys.stderr)
-                try:
-                    os.remove(cached)
-                except OSError as err:
-                    if path.exists(cached):
-                        print('error removing %s: %s' % (cached, err),
-                              file=sys.stderr)
-                return 1
-
-    shutil.copyfile(cached, outzip)
-    return 0
-
-
-if __name__ == '__main__':
-    sys.exit(main())
diff --git a/tools/js/run_npm_binary.py b/tools/js/run_npm_binary.py
deleted file mode 100644
index 31f8a54..0000000
--- a/tools/js/run_npm_binary.py
+++ /dev/null
@@ -1,102 +0,0 @@
-#!/usr/bin/env python3
-# Copyright (C) 2015 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from __future__ import print_function
-
-import atexit
-from distutils import spawn
-import hashlib
-import os
-import shutil
-import subprocess
-import sys
-import tarfile
-import tempfile
-
-
-def extract(path, outdir, bin):
-    if os.path.exists(os.path.join(outdir, bin)):
-        return  # Another process finished extracting, ignore.
-
-    # Use a temp directory adjacent to outdir so shutil.move can use the same
-    # device atomically.
-    tmpdir = tempfile.mkdtemp(dir=os.path.dirname(outdir))
-
-    def cleanup():
-        try:
-            shutil.rmtree(tmpdir)
-        except OSError:
-            pass  # Too late now
-    atexit.register(cleanup)
-
-    def extract_one(mem):
-        dest = os.path.join(outdir, mem.name)
-        tar.extract(mem, path=tmpdir)
-        try:
-            os.makedirs(os.path.dirname(dest))
-        except OSError:
-            pass  # Either exists, or will fail on the next line.
-        shutil.move(os.path.join(tmpdir, mem.name), dest)
-
-    with tarfile.open(path, 'r:gz') as tar:
-        for mem in tar.getmembers():
-            if mem.name != bin:
-                extract_one(mem)
-        # Extract bin last so other processes only short circuit when
-        # extraction is finished.
-        if bin in tar.getnames():
-            extract_one(tar.getmember(bin))
-
-
-def main(args):
-    path = args[0]
-    suffix = '.npm_binary.tgz'
-    tgz = os.path.basename(path)
-
-    parts = tgz[:-len(suffix)].split('@')
-
-    if not tgz.endswith(suffix) or len(parts) != 2:
-        print('usage: %s <path/to/npm_binary>' % sys.argv[0], file=sys.stderr)
-        return 1
-
-    name, _ = parts
-
-    # Avoid importing from gerrit because we don't want to depend on the right
-    # working directory
-    sha1 = hashlib.sha1(open(path, 'rb').read()).hexdigest()
-    outdir = '%s-%s' % (path[:-len(suffix)], sha1)
-    rel_bin = os.path.join('package', 'bin', name)
-    rel_lib_bin = os.path.join('package', 'lib', 'bin', name + '.js')
-    bin = os.path.join(outdir, rel_bin)
-    libbin = os.path.join(outdir, rel_lib_bin)
-    if not os.path.isfile(bin):
-        extract(path, outdir, rel_bin)
-
-    nodejs = spawn.find_executable('nodejs')
-    if nodejs:
-        # Debian installs Node.js as 'nodejs', due to a conflict with another
-        # package.
-        if not os.path.isfile(bin) and os.path.isfile(libbin):
-            subprocess.check_call([nodejs, libbin] + args[1:])
-        else:
-            subprocess.check_call([nodejs, bin] + args[1:])
-    elif not os.path.isfile(bin) and os.path.isfile(libbin):
-        subprocess.check_call([libbin] + args[1:])
-    else:
-        subprocess.check_call([bin] + args[1:])
-
-
-if __name__ == '__main__':
-    sys.exit(main(sys.argv[1:]))
diff --git a/tools/node_tools/legacy/BUILD b/tools/node_tools/legacy/BUILD
deleted file mode 100644
index ed0946e..0000000
--- a/tools/node_tools/legacy/BUILD
+++ /dev/null
@@ -1,15 +0,0 @@
-load("@build_bazel_rules_nodejs//:index.bzl", "nodejs_binary")
-
-package(default_visibility = ["//visibility:public"])
-
-nodejs_binary(
-    name = "polymer-bundler-bin",
-    data = ["@tools_npm//:node_modules"],
-    entry_point = "@tools_npm//:node_modules/polymer-bundler/lib/bin/polymer-bundler.js",
-)
-
-nodejs_binary(
-    name = "crisper-bin",
-    data = ["@tools_npm//:node_modules"],
-    entry_point = "@tools_npm//:node_modules/crisper/bin/crisper",
-)
diff --git a/tools/node_tools/legacy/index.bzl b/tools/node_tools/legacy/index.bzl
deleted file mode 100644
index fe66bf8..0000000
--- a/tools/node_tools/legacy/index.bzl
+++ /dev/null
@@ -1,66 +0,0 @@
-""" File contains a wrapper for legacy polymer-bundler and crisper tools. """
-
-# File must be removed after get rid of HTML imports
-
-def _polymer_bundler_tool_impl(ctx):
-    """Wrapper for the polymer-bundler and crisper command-line tools"""
-
-    html_bundled_file = ctx.actions.declare_file(ctx.label.name + "_tmp.html")
-    ctx.actions.run(
-        executable = ctx.executable._bundler,
-        outputs = [html_bundled_file],
-        inputs = ctx.files.srcs,
-        arguments = [
-            "--inline-css",
-            "--sourcemaps",
-            "--strip-comments",
-            "--root",
-            ctx.file.entry_point.dirname,
-            "--out-file",
-            html_bundled_file.path,
-            "--in-file",
-            ctx.file.entry_point.basename,
-        ],
-    )
-
-    output_js_file = ctx.outputs.js
-    if ctx.attr.script_src_value:
-        output_js_file = ctx.actions.declare_file(ctx.attr.script_src_value, sibling = ctx.outputs.html)
-    script_src_value = ctx.attr.script_src_value if ctx.attr.script_src_value else ctx.outputs.js.path
-
-    ctx.actions.run(
-        executable = ctx.executable._crisper,
-        outputs = [ctx.outputs.html, output_js_file],
-        inputs = [html_bundled_file],
-        arguments = ["-s", html_bundled_file.path, "-h", ctx.outputs.html.path, "-j", output_js_file.path, "--always-write-script", "--script-in-head=false"],
-    )
-
-    if ctx.attr.script_src_value:
-        ctx.actions.expand_template(
-            template = output_js_file,
-            output = ctx.outputs.js,
-            substitutions = {},
-        )
-
-polymer_bundler_tool = rule(
-    implementation = _polymer_bundler_tool_impl,
-    attrs = {
-        "entry_point": attr.label(allow_single_file = True, mandatory = True),
-        "srcs": attr.label_list(allow_files = True),
-        "script_src_value": attr.string(),
-        "_bundler": attr.label(
-            default = ":polymer-bundler-bin",
-            executable = True,
-            cfg = "host",
-        ),
-        "_crisper": attr.label(
-            default = ":crisper-bin",
-            executable = True,
-            cfg = "host",
-        ),
-    },
-    outputs = {
-        "html": "%{name}.html",
-        "js": "%{name}.js",
-    },
-)