TimelinePanel: REGRESSIONS: three fixes for TimelineOverviewPane.

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 2e6072958165d9453796eff76c8b2ea30e192bd6..307c973982abe4802132ef7361ece5726a68616b 100644
--- a/Source/devtools/front_end/TimelineOverviewPane.js
+++ b/Source/devtools/front_end/TimelineOverviewPane.js
@@ -97,6 +97,7 @@ WebInspector.TimelineOverviewPane.prototype = {
             this._overviewControl.update();
         this._overviewGrid.updateDividers(this._overviewCalculator);
         this._updateEventDividers();
+        this._updateWindow();

[pfeldman, 2014/03/04 06:26:52]

This is strange since window has not changed. We should make the grid belong and
update from the modes so that _overviewControl.windowBoundaries was not exposed.

     },
 
     _updateEventDividers: function()
@@ -152,6 +153,8 @@ WebInspector.TimelineOverviewPane.prototype = {
         if (this._muteOnWindowChanged)
             return;
         var windowTimes = this._overviewControl.windowTimes(this._overviewGrid.windowLeft(), this._overviewGrid.windowRight());
+        this._windowStartTime = windowTimes.startTime;

[pfeldman, 2014/03/04 06:26:52]

These three lines should be extracted (they are used in requestWindow times as
well).

+        this._windowEndTime = windowTimes.endTime;
         this.dispatchEventToListeners(WebInspector.TimelineOverviewPane.Events.WindowChanged, windowTimes);
     },
 
@@ -165,13 +168,17 @@ WebInspector.TimelineOverviewPane.prototype = {
             return;
         this._windowStartTime = startTime;
         this._windowEndTime = endTime;
-        var windowBoundaries = this._overviewControl.windowBoundaries(startTime, endTime);
+        this._updateWindow();
+        this.dispatchEventToListeners(WebInspector.TimelineOverviewPane.Events.WindowChanged, { startTime: startTime, endTime: endTime });
+    },
+
+    _updateWindow: function()
+    {
+        var windowBoundaries = this._overviewControl.windowBoundaries(this._windowStartTime, this._windowEndTime);
         this._muteOnWindowChanged = true;
         this._overviewGrid.setWindow(windowBoundaries.left, windowBoundaries.right);
         this._overviewGrid.setResizeEnabled(!!this._model.records().length);
         this._muteOnWindowChanged = false;
-
-        this.dispatchEventToListeners(WebInspector.TimelineOverviewPane.Events.WindowChanged, { startTime: startTime, endTime: endTime });
     },
 
     _scheduleRefresh: function()