DevTools: migrate from external Maps to symbols in the bindings objects.

third_party/WebKit/Source/devtools/front_end/sources/RevisionHistoryView.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 28 matching lines @@
     this._treeOutline = new UI.TreeOutlineInShadow();
     this._treeOutline.registerRequiredCSS('sources/revisionHistory.css');
     this._treeOutline.makeDense();
     this.element.appendChild(this._treeOutline.element);
 
     /**
      * @param {!Workspace.UISourceCode} uiSourceCode
      * @this {Sources.RevisionHistoryView}
      */
     function populateRevisions(uiSourceCode) {
-      if (uiSourceCode.history.length)
+      if (uiSourceCode.history().length)
         this._createUISourceCodeItem(uiSourceCode);
     }
 
     Workspace.workspace.uiSourceCodes().forEach(populateRevisions.bind(this));
     Workspace.workspace.addEventListener(
         Workspace.Workspace.Events.WorkingCopyCommittedByUser, this._revisionAdded, this);
     Workspace.workspace.addEventListener(
         Workspace.Workspace.Events.UISourceCodeRemoved, this._uiSourceCodeRemoved, this);
     Workspace.workspace.addEventListener(Workspace.Workspace.Events.ProjectRemoved, this._projectRemoved, this);
   }
@@ skipping 21 matching lines @@
       if (rootElement.childAt(i).title.localeCompare(uiSourceCode.displayName()) > 0) {
         rootElement.insertChild(uiSourceCodeItem, i);
         break;
       }
     }
     if (i === rootElement.childCount())
       rootElement.appendChild(uiSourceCodeItem);
 
     this._uiSourceCodeItems.set(uiSourceCode, uiSourceCodeItem);
 
-    var revisionCount = uiSourceCode.history.length;
+    var history = uiSourceCode.history();
+    var revisionCount = history.length;
     for (var i = revisionCount - 1; i >= 0; --i) {
-      var revision = uiSourceCode.history[i];
-      var historyItem =
-          new Sources.RevisionHistoryTreeElement(revision, uiSourceCode.history[i - 1], i !== revisionCount - 1);
+      var revision = history[i];
+      var historyItem = new Sources.RevisionHistoryTreeElement(revision, history[i - 1], i !== revisionCount - 1);
       uiSourceCodeItem.appendChild(historyItem);
     }
 
     var linkItem = new UI.TreeElement();
     linkItem.selectable = false;
     uiSourceCodeItem.appendChild(linkItem);
 
     var revertToOriginal =
         linkItem.listItemElement.createChild('span', 'revision-history-link revision-history-link-row');
     revertToOriginal.textContent = Common.UIString('apply original content');
@@ skipping 20 matching lines @@
   }
 
   _revisionAdded(event) {
     var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.data.uiSourceCode);
     var uiSourceCodeItem = this._uiSourceCodeItems.get(uiSourceCode);
     if (!uiSourceCodeItem) {
       uiSourceCodeItem = this._createUISourceCodeItem(uiSourceCode);
       return;
     }
 
-    var historyLength = uiSourceCode.history.length;
-    var historyItem = new Sources.RevisionHistoryTreeElement(
-        uiSourceCode.history[historyLength - 1], uiSourceCode.history[historyLength - 2], false);
+    var history = uiSourceCode.history();
+    var historyItem =
+        new Sources.RevisionHistoryTreeElement(history[history.length - 1], history[history.length - 2], false);
     if (uiSourceCodeItem.firstChild())
       uiSourceCodeItem.firstChild().allowRevert();
     uiSourceCodeItem.insertChild(historyItem, 0);
   }
 
   /**
    * @param {!Workspace.UISourceCode} uiSourceCode
    */
   _revealUISourceCode(uiSourceCode) {
     var uiSourceCodeItem = this._uiSourceCodeItems.get(uiSourceCode);
@@ skipping 144 matching lines @@
     contentSpan.textContent = lineContent;
     child.listItemElement.appendChild(contentSpan);
     child.listItemElement.classList.add('revision-history-line');
     contentSpan.classList.add('revision-history-line-' + changeType);
   }
 
   allowRevert() {
     this._revertElement.classList.remove('hidden');
   }
 };