Support counter graphs in Timeline based on trace events

Source/devtools/front_end/timeline/TimelinePanel.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 786 matching lines @@
         if (this._lazyFrameModel) {
             if (this._tracingTimelineModel) {
                 this._lazyFrameModel.reset();
                 this._lazyFrameModel.addTraceEvents(this._tracingTimelineModel.inspectedTargetEvents(), this._tracingModel.sessionId());
                 this._overviewPane.update();
             } else if (WebInspector.experimentsSettings.timelineNoLiveUpdate.isEnabled()) {
                 this._lazyFrameModel.reset();
                 this._lazyFrameModel.addRecords(this._model.records());
             }
         }
-        if (this._tracingTimelineModel)
+        if (this._tracingTimelineModel) {
+            this.requestWindowTimes(this._tracingTimelineModel.minimumRecordTime(), this._tracingTimelineModel.maximumRecordTime());
             this._refreshViews();
+        }
         this._hideProgressPane();
     },
 
     _onRecordAdded: function(event)
     {
         this._addRecord(/** @type {!WebInspector.TimelineModel.Record} */(event.data));
     },
 
     /**
      * @param {!WebInspector.TimelineModel.Record} record
@@ skipping 621 matching lines @@
      * @param {!WebInspector.TimelineModel.Record} record
      * @return {boolean}
      */
     accept: function(record)
     {
         return !this._hiddenRecords[record.type()];
     },
 
     __proto__: WebInspector.TimelineModel.Filter.prototype
 }