Some heap cleanup

Bug: 19534862
Change-Id: Ia63f489d26ec8813a263ce877bdbbc8c4e8fe5f4
diff --git a/runtime/gc/collector/semi_space.cc b/runtime/gc/collector/semi_space.cc
index 63def24..c11c134 100644
--- a/runtime/gc/collector/semi_space.cc
+++ b/runtime/gc/collector/semi_space.cc
@@ -226,7 +226,7 @@
     TimingLogger::ScopedTiming t2("RevokeAllThreadLocalAllocationStacks", GetTimings());
     heap_->RevokeAllThreadLocalAllocationStacks(self_);
   }
-  heap_->SwapStacks(self_);
+  heap_->SwapStacks();
   {
     WriterMutexLock mu(self_, *Locks::heap_bitmap_lock_);
     MarkRoots();