Add write barrier helper for code patching and refactor stack check patching.

src/incremental-marking.h

 // Copyright 2011 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 109 matching lines @@
                                                Object** slot,
                                                Isolate* isolate);
 
   inline bool BaseRecordWrite(HeapObject* obj, Object** slot, Object* value);
 
 
   inline void RecordWrite(HeapObject* obj, Object** slot, Object* value);
   inline void RecordWriteIntoCode(HeapObject* obj,
                                   RelocInfo* rinfo,
                                   Object* value);
+  void RecordCodeTargetPatch(Code* host, Address pc, HeapObject* value);
   void RecordCodeTargetPatch(Address pc, HeapObject* value);
   void RecordWriteOfCodeEntry(JSFunction* host, Object** slot, Code* value);
 
   inline void RecordWrites(HeapObject* obj);
 
   inline void BlackToGreyAndUnshift(HeapObject* obj, MarkBit mark_bit);
 
   inline void WhiteToGreyAndPush(HeapObject* obj, MarkBit mark_bit);
 
   inline void WhiteToGrey(HeapObject* obj, MarkBit mark_bit);
@@ skipping 107 matching lines @@
   bool should_hurry_;
   int allocation_marking_factor_;
   intptr_t allocated_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_INCREMENTAL_MARKING_H_