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

Source/devtools/front_end/Settings.js

 /*
  * Copyright (C) 2009 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 21 matching lines @@
 var Preferences = {
     maxInlineTextChildLength: 80,
     minDrawerHeight: 25,
     minSidebarWidth: 100,
     minSidebarHeight: 75,
     applicationTitle: "Developer Tools - %s"
 }
 
 var Capabilities = {
     isMainFrontend: false,
+    canProfilePower: false,
 }
 
 /**
  * @constructor
  */
 WebInspector.Settings = function()
 {
     this._eventSupport = new WebInspector.Object();
     this._registry = /** @type {!Object.<string, !WebInspector.Setting>} */ ({});
 
@@ skipping 229 matching lines @@
     this.doNotOpenDrawerOnEsc = this._createExperiment("doNotOpenDrawerWithEsc", "Do not open drawer on Esc");
     this.showEditorInDrawer = this._createExperiment("showEditorInDrawer", "Show editor in drawer");
     this.gpuTimeline = this._createExperiment("gpuTimeline", "Show GPU data on timeline");
     this.applyCustomStylesheet = this._createExperiment("applyCustomStylesheet", "Allow custom UI themes");
     this.workersInMainWindow = this._createExperiment("workersInMainWindow", "Show workers in main window");
     this.dockToLeft = this._createExperiment("dockToLeft", "Enable dock to left mode");
     this.allocationProfiler = this._createExperiment("allocationProfiler", "Enable JavaScript heap allocation profiler");
     this.timelineFlameChart = this._createExperiment("timelineFlameChart", "Enable FlameChart mode in Timeline");
     this.heapSnapshotStatistics = this._createExperiment("heapSnapshotStatistics", "Show memory breakdown statistics in heap snapshots");
     this.timelineNoLiveUpdate = this._createExperiment("timelineNoLiveUpdate", "Timeline w/o live update");
+    this.powerProfiler = this._createExperiment("powerProfiler", "Enable power mode in Timeline");
 
     this._cleanUpSetting();
 }
 
 WebInspector.ExperimentsSettings.prototype = {
     /**
      * @return {!Array.<!WebInspector.Experiment>}
      */
     get experiments()
     {
@@ skipping 298 matching lines @@
     {
         // If there are too many breakpoints in a storage, it is likely due to a recent bug that caused
         // periodical breakpoints duplication leading to inspector slowness.
         if (breakpointsSetting.get().length > maxBreakpointsCount)
             breakpointsSetting.set([]);
     }
 }
 
 WebInspector.settings = new WebInspector.Settings();
 WebInspector.experimentsSettings = new WebInspector.ExperimentsSettings(WebInspector.queryParam("experiments") !== null);