Force full GC whenever CollectAllGarbage is meant to trigger a full GC.

src/heap/mark-compact-inl.h

Index: src/heap/mark-compact-inl.h
diff --git a/src/heap/mark-compact-inl.h b/src/heap/mark-compact-inl.h
index fe32df01485a934df955ebbbd455c82ee77b8d8b..c4e2baea13e3b019bf3570a01078fddfb509ef11 100644
--- a/src/heap/mark-compact-inl.h
+++ b/src/heap/mark-compact-inl.h
@@ -23,6 +23,8 @@ void MarkCompactCollector::SetFlags(int flags) {
   reduce_memory_footprint_ = ((flags & Heap::kReduceMemoryFootprintMask) != 0);
   abort_incremental_marking_ =
       ((flags & Heap::kAbortIncrementalMarkingMask) != 0);
+  finalize_incremental_marking_ =
+      ((flags & Heap::kFinalizeIncrementalMarkingMask) != 0);

[ulan, 2015/04/14 11:56:49]

DCHECK(!finalize_incremental_marking_ ||  !abort_incremental_marking_);

[Hannes Payer (out of office), 2015/04/15 06:44:04]

Done.

 }