Only double align in PagedSpace::AllocateRawDoubleAligned when allocation succeeded.

src/heap/spaces-inl.h

Index: src/heap/spaces-inl.h
diff --git a/src/heap/spaces-inl.h b/src/heap/spaces-inl.h
index caa53ecee13077181908e5374c10eef10670d89d..78fda3c1e1562b99b99a9aa267b5b3ae79614868 100644
--- a/src/heap/spaces-inl.h
+++ b/src/heap/spaces-inl.h
@@ -303,7 +303,9 @@ AllocationResult PagedSpace::AllocateRawDoubleAligned(int size_in_bytes) {
     if (object == NULL) {
       object = SlowAllocateRaw(aligned_size_in_bytes);
     }
-    object = heap()->EnsureDoubleAligned(object, aligned_size_in_bytes);
+    if (object != NULL) {
+      object = heap()->EnsureDoubleAligned(object, aligned_size_in_bytes);
+    }
   }
 
   if (object != NULL) {