DevTools: make flame chart a web component.

Source/devtools/front_end/extensions/ExtensionPanel.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 29 matching lines @@
 {
     WebInspector.Panel.call(this, id);
     this._server = server;
     this.setHideOnDetach();
     this.element.classList.add("extension-panel");
     this._panelStatusBarElement = this.element.createChild("div", "panel-status-bar hidden");
 
     this._searchableView = new WebInspector.SearchableView(this);
     this._searchableView.show(this.element);
 
-    var extensionView = new WebInspector.ExtensionView(server, id, pageURL, "extension panel");
+    var extensionView = new WebInspector.ExtensionView(server, id, pageURL, "extension");
     extensionView.show(this._searchableView.element);
     this.setDefaultFocusedElement(extensionView.defaultFocusedElement());
 }
 
 WebInspector.ExtensionPanel.prototype = {
     /**
      * @return {!Element}
      */
     defaultFocusedElement: function()
     {
@@ skipping 226 matching lines @@
         if (!title)
             section.headerElement.classList.add("hidden");
         section.expanded = true;
         section.editable = false;
         this._objectPropertiesView.element.appendChild(section.element);
         callback();
     },
 
     __proto__: WebInspector.SidebarPane.prototype
 }