Tweak the context disposal GC heuristic: If the garbage collector

interface is exposed through the global gc() function, we avoid 
being clever about forcing GCs when contexts are disposed and leave 
it to the embedder to make informed decisions about when to force 
a collection.
Review URL: http://codereview.chromium.org/40154

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1422 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -295,11 +295,15 @@ void Heap::CollectAllGarbage() {
 
 
 void Heap::CollectAllGarbageIfContextDisposed() {
-  if (context_disposed_pending_) {
+  // If the garbage collector interface is exposed through the global
+  // gc() function, we avoid being clever about forcing GCs when
+  // contexts are disposed and leave it to the embedder to make
+  // informed decisions about when to force a collection.
+  if (!FLAG_expose_gc && context_disposed_pending_) {
     StatsRateScope scope(&Counters::gc_context);
     CollectAllGarbage();
-    context_disposed_pending_ = false;
   }
+  context_disposed_pending_ = false;
 }