Revert of Replace slots buffer with remembered set.

src/heap/incremental-marking.h

 // Copyright 2012 the V8 project 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 V8_HEAP_INCREMENTAL_MARKING_H_
 #define V8_HEAP_INCREMENTAL_MARKING_H_
 
 #include "src/cancelable-task.h"
 #include "src/execution.h"
 #include "src/heap/heap.h"
@@ skipping 147 matching lines @@
                                              Isolate* isolate);
 
   // Record a slot for compaction.  Returns false for objects that are
   // guaranteed to be rescanned or not guaranteed to survive.
   //
   // No slots in white objects should be recorded, as some slots are typed and
   // cannot be interpreted correctly if the underlying object does not survive
   // the incremental cycle (stays white).
   INLINE(bool BaseRecordWrite(HeapObject* obj, Object* value));
   INLINE(void RecordWrite(HeapObject* obj, Object** slot, Object* value));
-  INLINE(void RecordWriteIntoCode(Code* host, RelocInfo* rinfo, Object* value));
+  INLINE(void RecordWriteIntoCode(HeapObject* obj, RelocInfo* rinfo,
+                                  Object* value));
   INLINE(void RecordWriteOfCodeEntry(JSFunction* host, Object** slot,
                                      Code* value));
 
 
   void RecordWriteSlow(HeapObject* obj, Object** slot, Object* value);
-  void RecordWriteIntoCodeSlow(Code* host, RelocInfo* rinfo, Object* value);
+  void RecordWriteIntoCodeSlow(HeapObject* obj, RelocInfo* rinfo,
+                               Object* value);
   void RecordWriteOfCodeEntrySlow(JSFunction* host, Object** slot, Code* value);
   void RecordCodeTargetPatch(Code* host, Address pc, HeapObject* value);
   void RecordCodeTargetPatch(Address pc, HeapObject* value);
 
   void RecordWrites(HeapObject* obj);
 
   void BlackToGreyAndUnshift(HeapObject* obj, MarkBit mark_bit);
 
   void WhiteToGreyAndPush(HeapObject* obj, MarkBit mark_bit);
 
@@ skipping 114 matching lines @@
   GCRequestType request_type_;
 
   IncrementalMarkingJob incremental_marking_job_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_INCREMENTAL_MARKING_H_