Fix typo in Add|RemoveGCPrologueCallback

src/heap.h

 // Copyright 2012 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1082 matching lines @@
   }
 
   PromotionQueue* promotion_queue() { return &promotion_queue_; }
 
 #ifdef DEBUG
   // Utility used with flag gc-greedy.
   void GarbageCollectionGreedyCheck();
 #endif
 
   void AddGCPrologueCallback(
-      GCEpilogueCallback callback, GCType gc_type_filter);
-  void RemoveGCPrologueCallback(GCEpilogueCallback callback);
+      GCPrologueCallback callback, GCType gc_type_filter);
+  void RemoveGCPrologueCallback(GCPrologueCallback callback);
 
   void AddGCEpilogueCallback(
       GCEpilogueCallback callback, GCType gc_type_filter);
   void RemoveGCEpilogueCallback(GCEpilogueCallback callback);
 
   void SetGlobalGCPrologueCallback(GCCallback callback) {
     ASSERT((callback == NULL) ^ (global_gc_prologue_callback_ == NULL));
     global_gc_prologue_callback_ = callback;
   }
   void SetGlobalGCEpilogueCallback(GCCallback callback) {
@@ skipping 1657 matching lines @@
   AssertNoAllocation no_alloc;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG || LIVE_OBJECT_LIST
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_