Fix some correctness issues with the store buffer shown up by...

src/heap.cc

Index: src/heap.cc
===================================================================
--- src/heap.cc	(revision 6616)
+++ src/heap.cc	(working copy)
@@ -4125,8 +4125,8 @@
       if (Heap::InNewSpace(*slot)) {
         ASSERT(Heap::InToSpace(*slot));
         ASSERT((*slot)->IsHeapObject());
-        StoreBuffer::EnterDirectlyIntoStoreBuffer(
-            reinterpret_cast<Address>(slot));
+        ASSERT(StoreBuffer::CellIsInStoreBuffer(
+            reinterpret_cast<Address>(slot)));
       }
     }
     slot_address += kPointerSize;
@@ -4231,7 +4231,6 @@
       end = page->CachedAllocationWatermark();
     }
 
-
     Address map_aligned_current = page->ObjectAreaStart();
 
     ASSERT(map_aligned_current == MapStartAlign(map_aligned_current));