Kiss goodbye to MaybeObject.

src/incremental-marking-inl.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_INCREMENTAL_MARKING_INL_H_
 #define V8_INCREMENTAL_MARKING_INL_H_
 
 #include "incremental-marking.h"
 
 namespace v8 {
@@ skipping 27 matching lines @@
   }
   if (!is_compacting_) return false;
   MarkBit obj_bit = Marking::MarkBitFrom(obj);
   return Marking::IsBlack(obj_bit);
 }
 
 
 void IncrementalMarking::RecordWrite(HeapObject* obj,
                                      Object** slot,
                                      Object* value) {
-  if (IsMarking() && value->NonFailureIsHeapObject()) {
+  if (IsMarking() && value->IsHeapObject()) {
     RecordWriteSlow(obj, slot, value);
   }
 }
 
 
 void IncrementalMarking::RecordWriteOfCodeEntry(JSFunction* host,
                                                 Object** slot,
                                                 Code* value) {
   if (IsMarking()) RecordWriteOfCodeEntrySlow(host, slot, value);
 }
 
 
 void IncrementalMarking::RecordWriteIntoCode(HeapObject* obj,
                                              RelocInfo* rinfo,
                                              Object* value) {
-  if (IsMarking() && value->NonFailureIsHeapObject()) {
+  if (IsMarking() && value->IsHeapObject()) {
     RecordWriteIntoCodeSlow(obj, rinfo, value);
   }
 }
 
 
 void IncrementalMarking::RecordWrites(HeapObject* obj) {
   if (IsMarking()) {
     MarkBit obj_bit = Marking::MarkBitFrom(obj);
     if (Marking::IsBlack(obj_bit)) {
       MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
@@ skipping 38 matching lines @@
 
 void IncrementalMarking::WhiteToGreyAndPush(HeapObject* obj, MarkBit mark_bit) {
   Marking::WhiteToGrey(mark_bit);
   marking_deque_.PushGrey(obj);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_INCREMENTAL_MARKING_INL_H_