Use page header information to test for InNewSpace.

src/heap.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 987 matching lines @@
   // This interval is considered to belong to the map space.
   static void IteratePointersFromMapsToNewSpace(Heap* heap,
                                                 Address start,
                                                 Address end,
                                                 ObjectSlotCallback callback);
 
 
   // Returns whether the object resides in new space.
   inline bool InNewSpace(Object* object);
   inline bool InNewSpace(Address addr);
+  inline bool InNewSpacePage(Address addr);
   inline bool InFromSpace(Object* object);
   inline bool InToSpace(Object* object);
 
   // Checks whether an address/object in the heap (including auxiliary
   // area and unused area).
   bool Contains(Address addr);
   bool Contains(HeapObject* value);
 
   // Checks whether an address/object in a space.
   // Currently used by tests, serialization and heap verification only.
@@ skipping 1326 matching lines @@
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG || LIVE_OBJECT_LIST
 
 } }  // namespace v8::internal
 
 #undef HEAP
 
 #endif  // V8_HEAP_H_