Refactor the Heap into ThreadHeap to prepare for per thread heaps

third_party/WebKit/Source/platform/heap/BlinkGC.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BlinkGC_h
 #define BlinkGC_h
 
 // BlinkGC.h is a file that defines common things used by Blink GC.
 
 #include "platform/PlatformExport.h"
@@ skipping 32 matching lines @@
     // can be pointers to Blink GC managed objects on the stack for
     // each thread. When threads reach a safe point they record
     // whether or not they have pointers on the stack.
     enum StackState {
         NoHeapPointersOnStack,
         HeapPointersOnStack
     };
 
     enum GCType {
         // Both of the marking task and the sweeping task run in
-        // Heap::collectGarbage().
+        // ThreadHeap::collectGarbage().
         GCWithSweep,
-        // Only the marking task runs in Heap::collectGarbage().
+        // Only the marking task runs in ThreadHeap::collectGarbage().
         // The sweeping task is split into chunks and scheduled lazily.
         GCWithoutSweep,
         // Only the marking task runs just to take a heap snapshot.
         // The sweeping task doesn't run. The marks added in the marking task
         // are just cleared.
         TakeSnapshot,
         // The marking task does not mark objects outside the heap of the GCing
         // thread.
         ThreadTerminationGC,
         // Just run thread-local weak processing. The weak processing may trace
@@ skipping 33 matching lines @@
 
     enum V8GCType {
         V8MinorGC,
         V8MajorGC,
     };
 };
 
 } // namespace blink
 
 #endif