[DevTools] Add power profiler and power overview in timeline panel.

Source/devtools/front_end/Target.js

 /*
  * Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /**
  * @constructor
  * @extends {Protocol.Agents}
  * @param {!InspectorBackendClass.Connection} connection
  * @param {function(!WebInspector.Target)=} callback
  */
 WebInspector.Target = function(connection, callback)
 {
     Protocol.Agents.call(this, connection.agentsMap());
     this._connection = connection;
     this.isMainFrontend = false;
 
     this.pageAgent().canScreencast(this._initializeCapability.bind(this, "canScreencast", null));
+
+    if (WebInspector.experimentsSettings.powerProfiler.isEnabled())
+        this.powerAgent().canProfilePower(this._initializeCapability.bind(this, "canProfilePower", null));
+
     this.workerAgent().canInspectWorkers(this._initializeCapability.bind(this, "isMainFrontend", this._loadedWithCapabilities.bind(this, callback)));
 }
 
 WebInspector.Target.prototype = {
 
     _initializeCapability: function(name, callback, error, result)
     {
         this[name] = result;
         if (!Capabilities[name])
             Capabilities[name] = result;
@@ skipping 28 matching lines @@
             WebInspector.runtimeModel = this.runtimeModel;
 
         this.domModel = new WebInspector.DOMModel();
         if (!WebInspector.domModel)
             WebInspector.domModel = this.domModel;
 
         this.workerManager = new WebInspector.WorkerManager(this, this.isMainFrontend);
         if (!WebInspector.workerManager)
             WebInspector.workerManager = this.workerManager;
 
+        if (this.canProfilePower)
+            WebInspector.powerProfiler = new WebInspector.PowerProfiler();
+
         if (callback)
             callback(this);
     },
 
     /**
      * @override
      * @param {string} domain
      * @param {!Object} dispatcher
      */
     registerDispatcher: function(domain, dispatcher)
@@ skipping 68 matching lines @@
         return this._targets[0];
     },
 
     __proto__: WebInspector.Object.prototype
 }
 
 /**
  * @type {!WebInspector.TargetManager}
  */
 WebInspector.targetManager;