Refactor the Heap into ThreadHeap to prepare for per thread heaps

third_party/WebKit/Source/devtools/front_end/timeline/TimelineModel.js

 /*
  * Copyright (C) 2012 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 137 matching lines @@
     LayerTreeHostImplSnapshot: "cc::LayerTreeHostImpl",
     PictureSnapshot: "cc::Picture",
     DisplayItemListSnapshot: "cc::DisplayItemList",
     LatencyInfo: "LatencyInfo",
     LatencyInfoFlow: "LatencyInfo.Flow",
     InputLatencyMouseMove: "InputLatency::MouseMove",
     InputLatencyMouseWheel: "InputLatency::MouseWheel",
     ImplSideFling: "InputHandlerProxy::HandleGestureFling::started",
     GCIdleLazySweep: "ThreadState::performIdleLazySweep",
     GCCompleteSweep: "ThreadState::completeSweep",
-    GCCollectGarbage: "Heap::collectGarbage",
+    GCCollectGarbage: "ThreadHeap::collectGarbage",
 
     // CpuProfile is a virtual event created on frontend to support
     // serialization of CPU Profiles within tracing timeline data.
     CpuProfile: "CpuProfile"
 }
 
 WebInspector.TimelineModel.Category = {
     Console: "blink.console",
     UserTiming: "blink.user_timing",
     LatencyInfo: "latencyInfo"
@@ skipping 1601 matching lines @@
     },
 
     /**
      * @return {!Map<string, !Map<number, number>>}
      */
     files: function()
     {
         return this._files;
     }
 }