Revert of Simple BlinkGC heap compaction.

third_party/WebKit/Source/platform/heap/Heap.cpp

Index: third_party/WebKit/Source/platform/heap/Heap.cpp
diff --git a/third_party/WebKit/Source/platform/heap/Heap.cpp b/third_party/WebKit/Source/platform/heap/Heap.cpp
index c44068b3756f3ada687e55f6f33ac912a7406f87..b1c035cc51b9069d6c31f29de13d8d4a0e59ecd9 100644
--- a/third_party/WebKit/Source/platform/heap/Heap.cpp
+++ b/third_party/WebKit/Source/platform/heap/Heap.cpp
@@ -35,7 +35,6 @@
 #include "platform/ScriptForbiddenScope.h"
 #include "platform/heap/BlinkGCMemoryDumpProvider.h"
 #include "platform/heap/CallbackStack.h"
-#include "platform/heap/HeapCompact.h"
 #include "platform/heap/MarkingVisitor.h"
 #include "platform/heap/PageMemory.h"
 #include "platform/heap/PagePool.h"
@@ -411,25 +410,6 @@
   m_postMarkingCallbackStack->commit();
   m_globalWeakCallbackStack->commit();
   m_ephemeronStack->commit();
-}
-
-HeapCompact* ThreadHeap::compaction() {
-  if (!m_compaction)
-    m_compaction = HeapCompact::create();
-  return m_compaction.get();
-}
-
-void ThreadHeap::registerMovingObjectReference(MovableReference* slot) {
-  DCHECK(slot);
-  DCHECK(*slot);
-  compaction()->registerMovingObjectReference(slot);
-}
-
-void ThreadHeap::registerMovingObjectCallback(MovableReference reference,
-                                              MovingObjectCallback callback,
-                                              void* callbackData) {
-  DCHECK(reference);
-  compaction()->registerMovingObjectCallback(reference, callback, callbackData);
 }
 
 void ThreadHeap::decommitCallbackStacks() {