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

Source/devtools/front_end/TimelineOverviewPane.js

Index: Source/devtools/front_end/TimelineOverviewPane.js
diff --git a/Source/devtools/front_end/TimelineOverviewPane.js b/Source/devtools/front_end/TimelineOverviewPane.js
index 307c973982abe4802132ef7361ece5726a68616b..499bb5894a34c5df93ec80e3e4c732681b6c5a0e 100644
--- a/Source/devtools/front_end/TimelineOverviewPane.js
+++ b/Source/devtools/front_end/TimelineOverviewPane.js
@@ -38,6 +38,9 @@ WebInspector.TimelineOverviewPane = function(model)
     WebInspector.View.call(this);
     this.element.id = "timeline-overview-pane";
 
+    if (WebInspector.experimentsSettings.powerProfiler.isEnabled() && Capabilities.canProfilePower)
+        this.element.classList.add("power-overview");

[pfeldman, 2014/03/24 13:41:25]

You should not modify the overview, not even when the power profiler is there.

[Pan, 2014/03/25 12:30:20]

removed.

+
     this._eventDividers = [];
 
     this._model = model;
@@ -152,7 +155,9 @@ WebInspector.TimelineOverviewPane.prototype = {
     {
         if (this._muteOnWindowChanged)
             return;
+
         var windowTimes = this._overviewControl.windowTimes(this._overviewGrid.windowLeft(), this._overviewGrid.windowRight());
+        this._overviewControl.windowChanged(windowTimes.startTime, windowTimes.endTime);

[pfeldman, 2014/03/24 13:41:25]

Overview control should not be concerned about the time range selected.

[Pan, 2014/03/25 12:30:20]

Done.

         this._windowStartTime = windowTimes.startTime;
         this._windowEndTime = windowTimes.endTime;
         this.dispatchEventToListeners(WebInspector.TimelineOverviewPane.Events.WindowChanged, windowTimes);
@@ -315,6 +320,11 @@ WebInspector.TimelineOverviewBase.prototype = {
     update: function() { },
     reset: function() { },
 
+    startTimeline: function() { },

[pfeldman, 2014/03/24 13:41:25]

These should be called timelineStarted and timelineStopped

[Pan, 2014/03/25 12:30:20]

Done.

+    stopTimeline: function() { },
+
+    windowChanged: function(timeLeft, timeRight) { },

[pfeldman, 2014/03/24 13:41:25]

Overview should not be concerned with the selected range change.

[Pan, 2014/03/25 06:12:31]

The intention is, I'd like to draw the energy consumption on the panel when
users choose a time window in the PowerOverviewPane. is there other approach to
achieve that?

[Pan, 2014/03/25 12:30:20]

Done.

+
     /**
      * @param {number} windowLeft
      * @param {number} windowRight