Fix release build. Add comment accidentally omitted from

preceeding change (stress-compaction).
Review URL: https://chromiumcodereview.appspot.com/10161027

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11432 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -6142,9 +6142,11 @@ void Heap::SetStackLimits() {
 
 
 void Heap::TearDown() {
+#ifdef DEBUG
   if (FLAG_verify_heap) {
     Verify();
   }
+#endif
   if (FLAG_print_cumulative_gc_stat) {
     PrintF("\n\n");
     PrintF("gc_count=%d ", gc_count_);

src/spaces-inl.h

@@ -296,6 +296,8 @@ MaybeObject* PagedSpace::AllocateRaw(int size_in_bytes) {
 MaybeObject* NewSpace::AllocateRaw(int size_in_bytes) {
   Address old_top = allocation_info_.top;
 #ifdef DEBUG
+  // If we are stressing compaction we waste some memory in new space
+  // in order to get more frequent GCs.
   if (FLAG_stress_compaction && !HEAP->linear_allocation()) {
     if (allocation_info_.limit - old_top >= size_in_bytes * 4) {
       int filler_size = size_in_bytes * 4;