Fix Heap::AllocateFillerObject() to use double alignment param.

src/heap/heap.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 "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/bits.h"
 #include "src/base/once.h"
@@ skipping 2516 matching lines @@
   map->set_elements_kind(elements_kind);
 
   return map;
 }
 
 
 AllocationResult Heap::AllocateFillerObject(int size, bool double_align,
                                             AllocationSpace space) {
   HeapObject* obj;
   {
-    AllocationResult allocation = AllocateRaw(size, space, space);
+    AllocationAlignment align = double_align ? kDoubleAligned : kWordAligned;
+    AllocationResult allocation = AllocateRaw(size, space, space, align);
     if (!allocation.To(&obj)) return allocation;
   }
 #ifdef DEBUG
   MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
   DCHECK(chunk->owner()->identity() == space);
 #endif
   CreateFillerObjectAt(obj->address(), size);
   return obj;
 }
 
@@ skipping 3981 matching lines @@
       }
       delete list;
     } else {
       prev = list;
     }
     list = next;
   }
 }
 }
 }  // namespace v8::internal