Kiss goodbye to MaybeObject.

src/incremental-marking.cc

 // 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.
 
 #include "v8.h"
 
 #include "incremental-marking.h"
 
 #include "code-stubs.h"
 #include "compilation-cache.h"
@@ skipping 222 matching lines @@
     VisitPointers(heap,
                   HeapObject::RawField(object,
                                        JSWeakCollection::kPropertiesOffset),
                   HeapObject::RawField(object, JSWeakCollection::kSize));
   }
 
   static void BeforeVisitingSharedFunctionInfo(HeapObject* object) {}
 
   INLINE(static void VisitPointer(Heap* heap, Object** p)) {
     Object* obj = *p;
-    if (obj->NonFailureIsHeapObject()) {
+    if (obj->IsHeapObject()) {
       heap->mark_compact_collector()->RecordSlot(p, p, obj);
       MarkObject(heap, obj);
     }
   }
 
   INLINE(static void VisitPointers(Heap* heap, Object** start, Object** end)) {
     for (Object** p = start; p < end; p++) {
       Object* obj = *p;
-      if (obj->NonFailureIsHeapObject()) {
+      if (obj->IsHeapObject()) {
         heap->mark_compact_collector()->RecordSlot(start, p, obj);
         MarkObject(heap, obj);
       }
     }
   }
 
   INLINE(static void VisitPointersWithAnchor(Heap* heap,
                                              Object** anchor,
                                              Object** start,
                                              Object** end)) {
     for (Object** p = start; p < end; p++) {
       Object* obj = *p;
-      if (obj->NonFailureIsHeapObject()) {
+      if (obj->IsHeapObject()) {
         heap->mark_compact_collector()->RecordSlot(anchor, p, obj);
         MarkObject(heap, obj);
       }
     }
   }
 
   // Marks the object grey and pushes it on the marking stack.
   INLINE(static void MarkObject(Heap* heap, Object* obj)) {
     HeapObject* heap_object = HeapObject::cast(obj);
     MarkBit mark_bit = Marking::MarkBitFrom(heap_object);
@@ skipping 716 matching lines @@
   bytes_scanned_ = 0;
   write_barriers_invoked_since_last_step_ = 0;
 }
 
 
 int64_t IncrementalMarking::SpaceLeftInOldSpace() {
   return heap_->MaxOldGenerationSize() - heap_->PromotedSpaceSizeOfObjects();
 }
 
 } }  // namespace v8::internal