Clear normalized map caches in all global contexts not just in those reachable...

Clear normalized map caches in all global contexts not just in those reachable from ThreadLocalTops.

Issue reported by Mark Lam <mark.lam@palm.com> from Hewlett-Packard Development Company, LP.

Review URL: http://codereview.chromium.org/3828011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5654 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -606,19 +606,14 @@ void Heap::ClearJSFunctionResultCaches() {
 }
 
 
-class ClearThreadNormalizedMapCachesVisitor: public ThreadVisitor {
-  virtual void VisitThread(ThreadLocalTop* top) {
-    Context* context = top->context_;
-    if (context == NULL) return;
-    context->global()->global_context()->normalized_map_cache()->Clear();
-  }
-};
-
-
 void Heap::ClearNormalizedMapCaches() {
   if (Bootstrapper::IsActive()) return;
-  ClearThreadNormalizedMapCachesVisitor visitor;
-  ThreadManager::IterateArchivedThreads(&visitor);
+
+  Object* context = global_contexts_list_;
+  while (!context->IsUndefined()) {
+    Context::cast(context)->normalized_map_cache()->Clear();
+    context = Context::cast(context)->get(Context::NEXT_CONTEXT_LINK);
+  }
 }