Make InToSpace/InFromSpace use the page header.

src/heap-inl.h

Index: src/heap-inl.h
diff --git a/src/heap-inl.h b/src/heap-inl.h
index 3bd479d008b9830d367c77c0374bbf0a1ec15512..e0aec4290e5424d1961ef63f4da6c337ac079318 100644
--- a/src/heap-inl.h
+++ b/src/heap-inl.h
@@ -254,7 +254,7 @@ MaybeObject* Heap::AllocateRawCell() {
 
 
 bool Heap::InNewSpace(Object* object) {
-  bool result = new_space_.PageContains(object);
+  bool result = new_space_.Contains(object);
   ASSERT(!result ||                  // Either not in new space
          gc_state_ != NOT_IN_GC ||   // ... or in the middle of GC
          InToSpace(object));         // ... or in to-space (where we allocate).