Fix gc stress builder.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/19507004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15726 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/test-heap.cc

@@ -1948,7 +1948,7 @@ TEST(PrototypeTransitionClearing) {
 
   // Verify that only dead prototype transitions are cleared.
   CHECK_EQ(10, baseObject->map()->NumberOfProtoTransitions());
-  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
   const int transitions = 10 - 3;
   CHECK_EQ(transitions, baseObject->map()->NumberOfProtoTransitions());