Modularize syntax theme

Change-Id: I682bdbeb6b8bd4dbb4b389c52043db4b6c19286e

polygerrit-ui/app/elements/diff/gr-diff/gr-diff.html

diff --git a/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.html b/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.html
index e09e125..72afd4a 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.html
+++ b/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.html
@@ -21,6 +21,7 @@
 <link rel="import" href="../gr-diff-comment-thread/gr-diff-comment-thread.html">
 <link rel="import" href="../gr-diff-highlight/gr-diff-highlight.html">
 <link rel="import" href="../gr-diff-selection/gr-diff-selection.html">
+<link rel="import" href="../gr-syntax-themes/gr-theme-default.html">
 
 <dom-module id="gr-diff">
   <template>
@@ -140,83 +141,8 @@
         content: '\00BB';
         position: absolute;
       }
-
-      /* Syntax highlights */
-      /* Highlight.js emits the following classes that do not have styles here:
-          subst, symbol, class, function, doctag, meta-string, section,
-          builtin-name, bulletm, code, formula, quote, addition, deletion
-        See:
-          http://highlightjs.readthedocs.io/en/latest/css-classes-reference.html
-      */
-      .gr-syntax-literal,
-      .gr-syntax-keyword,
-      .gr-syntax-selector-tag {
-        font-weight: bold;
-        color: #00f;
-      }
-      .gr-syntax-built_in {
-        color: #555;
-      }
-      .gr-syntax-type,
-      .gr-syntax-selector-pseudo,
-      .gr-syntax-template-variable {
-        color: #ff00e7;
-      }
-      .gr-syntax-number {
-        color: violet;
-      }
-      .gr-syntax-regexp,
-      .gr-syntax-variable,
-      .gr-syntax-selector-attr,
-      .gr-syntax-template-tag {
-        color: #FA8602;
-      }
-      .gr-syntax-string,
-      .gr-syntax-selector-id {
-        color: #018846;
-      }
-      .gr-syntax-title {
-        color: teal;
-      }
-      .gr-syntax-params {
-        color: red;
-      }
-      .gr-syntax-comment {
-        color: #af72a9;
-        font-style: italic;
-      }
-      .gr-syntax-meta {
-        color: #0091AD;
-      }
-      .gr-syntax-meta-keyword {
-        color: #00426b;
-        font-weight: bold;
-      }
-      .gr-syntax-tag {
-        color: #DB7C00;
-      }
-      .gr-syntax-name { /* XML/HTML Tag Name */
-        color: brown;
-      }
-      .gr-syntax-attr { /* XML/HTML Attribute */
-        color: #8C7250;
-      }
-      .gr-syntax-attribute { /* CSS Property */
-        color: #299596;
-      }
-      .gr-syntax-emphasis {
-        font-style: italic;
-      }
-      .gr-syntax-strong {
-        font-weight: bold;
-      }
-      .gr-syntax-link {
-        color: blue;
-      }
-      .gr-syntax-selector-class {
-        color: #1F71FF;
-      }
     </style>
+    <style include="gr-theme-default"></style>
     <div class$="[[_computeContainerClass(_loggedIn, viewMode)]]"
         on-tap="_handleTap">
       <gr-diff-selection>

polygerrit-ui/app/elements/diff/gr-syntax-themes/gr-theme-default.html

diff --git a/polygerrit-ui/app/elements/diff/gr-syntax-themes/gr-theme-default.html b/polygerrit-ui/app/elements/diff/gr-syntax-themes/gr-theme-default.html
new file mode 100644
index 0000000..e2abc52
--- /dev/null
+++ b/polygerrit-ui/app/elements/diff/gr-syntax-themes/gr-theme-default.html
@@ -0,0 +1,97 @@
+<!--
+Copyright (C) 2016 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.
+-->
+<dom-module id="gr-theme-default">
+  <template>
+    <style>
+      /**
+       * @overview Highlight.js emits the following classes that do not have
+       * styles here:
+       *    subst, symbol, class, function, doctag, meta-string, section,
+       *    builtin-name, bulletm, code, formula, quote, addition, deletion
+       * @see {@link http://highlightjs.readthedocs.io/en/latest/css-classes-reference.html}
+       */
+
+      .gr-syntax-literal,
+      .gr-syntax-keyword,
+      .gr-syntax-selector-tag {
+        font-weight: bold;
+        color: #00f;
+      }
+      .gr-syntax-built_in {
+        color: #555;
+      }
+      .gr-syntax-type,
+      .gr-syntax-selector-pseudo,
+      .gr-syntax-template-variable {
+        color: #ff00e7;
+      }
+      .gr-syntax-number {
+        color: violet;
+      }
+      .gr-syntax-regexp,
+      .gr-syntax-variable,
+      .gr-syntax-selector-attr,
+      .gr-syntax-template-tag {
+        color: #FA8602;
+      }
+      .gr-syntax-string,
+      .gr-syntax-selector-id {
+        color: #018846;
+      }
+      .gr-syntax-title {
+        color: teal;
+      }
+      .gr-syntax-params {
+        color: red;
+      }
+      .gr-syntax-comment {
+        color: #af72a9;
+        font-style: italic;
+      }
+      .gr-syntax-meta {
+        color: #0091AD;
+      }
+      .gr-syntax-meta-keyword {
+        color: #00426b;
+        font-weight: bold;
+      }
+      .gr-syntax-tag {
+        color: #DB7C00;
+      }
+      .gr-syntax-name { /* XML/HTML Tag Name */
+        color: brown;
+      }
+      .gr-syntax-attr { /* XML/HTML Attribute */
+        color: #8C7250;
+      }
+      .gr-syntax-attribute { /* CSS Property */
+        color: #299596;
+      }
+      .gr-syntax-emphasis {
+        font-style: italic;
+      }
+      .gr-syntax-strong {
+        font-weight: bold;
+      }
+      .gr-syntax-link {
+        color: blue;
+      }
+      .gr-syntax-selector-class {
+        color: #1F71FF;
+      }
+    </style>
+  </template>
+</dom-module>
\ No newline at end of file