DevTools: add Tracing agent on back-end

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 125 matching lines @@
     Events: "Events",
     Frames: "Frames"
 };
 
 // Define row and header height, should be in sync with styles for timeline graphs.
 WebInspector.TimelinePanel.rowHeight = 18;
 WebInspector.TimelinePanel.headerHeight = 20;
 
 WebInspector.TimelinePanel.durationFilterPresetsMs = [0, 1, 15];
 
+WebInspector.TimelinePanel.defaultTracingCategoryFilter = "*,disabled-by-default-cc.debug,disabled-by-default-devtools.timeline";
+
 WebInspector.TimelinePanel.prototype = {
     /**
      * @return {?WebInspector.SearchableView}
      */
     searchableView: function()
     {
         return this._searchableView;
     },
 
     wasShown: function()
@@ skipping 87 matching lines @@
     },
 
     /**
      * @return {!WebInspector.TracingModel}
      */
     _tracingModel: function()
     {
         if (!this._lazyTracingModel) {
             this._lazyTracingModel = new WebInspector.TracingModel();
             this._lazyTracingModel.addEventListener(WebInspector.TracingModel.Events.BufferUsage, this._onTracingBufferUsage, this);
+            this._lazyTracingModel.enable(WebInspector.TimelinePanel.defaultTracingCategoryFilter);
         }
         return this._lazyTracingModel;
     },
 
     /**
      * @return {!WebInspector.TimelineView}
      */
     _timelineView: function()
     {
         if (!this._lazyTimelineView)
@@ skipping 352 matching lines @@
     },
 
     /**
      * @param {boolean} userInitiated
      */
     _startRecording: function(userInitiated)
     {
         this._userInitiatedRecording = userInitiated;
         this._model.startRecording(this._captureStacksSetting.get(), this._captureMemorySetting.get());
         if (WebInspector.experimentsSettings.timelineTracingMode.isEnabled())
-            this._tracingModel().start(WebInspector.TimelineManager.defaultTracingCategories, "");
+            this._tracingModel().start(WebInspector.TimelinePanel.defaultTracingCategoryFilter, "");
         for (var i = 0; i < this._overviewControls.length; ++i)
             this._overviewControls[i].timelineStarted();
 
         if (userInitiated)
             WebInspector.userMetrics.TimelineStarted.record();
     },
 
     _stopRecording: function()
     {
         this._userInitiatedRecording = false;
@@ skipping 615 matching lines @@
      * @param {!WebInspector.TimelineModel.Record} record
      * @return {boolean}
      */
     accept: function(record)
     {
         return !this._hiddenRecords[record.type];
     },
 
     __proto__: WebInspector.TimelineModel.Filter.prototype
 }