Revert of Simple BlinkGC heap compaction.

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

Index: third_party/WebKit/Source/platform/heap/MarkingVisitor.h
diff --git a/third_party/WebKit/Source/platform/heap/MarkingVisitor.h b/third_party/WebKit/Source/platform/heap/MarkingVisitor.h
index b5eb0b471e65792c626ff4ba84395fa46876ceb7..516ac19dfab814149dfd372b90a37d8651a2898d 100644
--- a/third_party/WebKit/Source/platform/heap/MarkingVisitor.h
+++ b/third_party/WebKit/Source/platform/heap/MarkingVisitor.h
@@ -48,16 +48,6 @@
   }
 #endif
 
-  void registerMovingObjectReference(MovableReference* slot) override {
-    Impl::registerMovingObjectReference(slot);
-  }
-
-  void registerMovingObjectCallback(MovableReference backingStore,
-                                    MovingObjectCallback callback,
-                                    void* callbackData) override {
-    Impl::registerMovingObjectCallback(backingStore, callback, callbackData);
-  }
-
   bool ensureMarked(const void* objectPointer) override {
     return Impl::ensureMarked(objectPointer);
   }