Convert polygerrit to es6-modules

This change replace all HTML imports with es6-modules. The only exceptions are:
* gr-app.html file, which can be deleted only after updating the
  gerrit/httpd/raw/PolyGerritIndexHtml.soy file.
* dark-theme.html which is loaded via importHref. Must be updated manually
  later in a separate change.

This change was produced automatically by ./es6-modules-converter.sh script.
No manual changes were made.

Change-Id: I0c447dd8c05757741e2c940720652d01d9fb7d67
diff --git a/polygerrit-ui/app/elements/change/gr-confirm-revert-submission-dialog/gr-confirm-revert-submission-dialog_html.js b/polygerrit-ui/app/elements/change/gr-confirm-revert-submission-dialog/gr-confirm-revert-submission-dialog_html.js
index f2cfef8..a68920c 100644
--- a/polygerrit-ui/app/elements/change/gr-confirm-revert-submission-dialog/gr-confirm-revert-submission-dialog_html.js
+++ b/polygerrit-ui/app/elements/change/gr-confirm-revert-submission-dialog/gr-confirm-revert-submission-dialog_html.js
@@ -1,29 +1,22 @@
-<!--
-@license
-Copyright (C) 2019 The Android Open Source Project
+/**
+ * @license
+ * Copyright (C) 2020 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 {html} from '@polymer/polymer/lib/utils/html-tag.js';
 
-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.
--->
-
-<link rel="import" href="/bower_components/iron-autogrow-textarea/iron-autogrow-textarea.html">
-<link rel="import" href="/bower_components/polymer/polymer.html">
-<link rel="import" href="../../../behaviors/fire-behavior/fire-behavior.html">
-<link rel="import" href="../../shared/gr-dialog/gr-dialog.html">
-<link rel="import" href="../../../styles/shared-styles.html">
-<link rel="import" href="../../shared/gr-js-api-interface/gr-js-api-interface.html">
-
-<dom-module id="gr-confirm-revert-submission-dialog">
-  <template>
+export const htmlTemplate = html`
     <!-- TODO(taoalpha): move all shared styles to a style module. -->
     <style include="shared-styles">
       :host {
@@ -45,24 +38,14 @@
         width: 73ch; /* Add a char to account for the border. */
       }
     </style>
-    <gr-dialog
-        confirm-label="Revert Submission"
-        on-confirm="_handleConfirmTap"
-        on-cancel="_handleCancelTap">
+    <gr-dialog confirm-label="Revert Submission" on-confirm="_handleConfirmTap" on-cancel="_handleCancelTap">
       <div class="header" slot="header">Revert Submission</div>
       <div class="main" slot="main">
         <label for="messageInput">
           Revert Commit Message
         </label>
-        <iron-autogrow-textarea
-            id="messageInput"
-            class="message"
-            autocomplete="on"
-            max-rows="15"
-            bind-value="{{message}}"></iron-autogrow-textarea>
+        <iron-autogrow-textarea id="messageInput" class="message" autocomplete="on" max-rows="15" bind-value="{{message}}"></iron-autogrow-textarea>
       </div>
     </gr-dialog>
     <gr-js-api-interface id="jsAPI"></gr-js-api-interface>
-  </template>
-  <script src="gr-confirm-revert-submission-dialog.js"></script>
-</dom-module>
+`;