Do not do post GC processing for scavenges.

Typically there is no or few global handles to delete (only manually deleted, but those might be
reused).

Review URL: http://codereview.chromium.org/274050

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3083 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -478,7 +478,13 @@ void Heap::PerformGarbageCollection(AllocationSpace space,
 
   Counters::objs_since_last_young.Set(0);
 
-  PostGarbageCollectionProcessing();
+  if (collector == MARK_COMPACTOR) {
+    DisableAssertNoAllocation allow_allocation;
+    GlobalHandles::PostGarbageCollectionProcessing();
+  }
+
+  // Update relocatables.
+  Relocatable::PostGarbageCollectionProcessing();
 
   if (collector == MARK_COMPACTOR) {
     // Register the amount of external allocated memory.
@@ -494,17 +500,6 @@ void Heap::PerformGarbageCollection(AllocationSpace space,
 }
 
 
-void Heap::PostGarbageCollectionProcessing() {
-  // Process weak handles post gc.
-  {
-    DisableAssertNoAllocation allow_allocation;
-    GlobalHandles::PostGarbageCollectionProcessing();
-  }
-  // Update relocatables.
-  Relocatable::PostGarbageCollectionProcessing();
-}
-
-
 void Heap::MarkCompact(GCTracer* tracer) {
   gc_state_ = MARK_COMPACT;
   mc_count_++;

src/heap.h

@@ -637,9 +637,6 @@ class Heap : public AllStatic {
   static void GarbageCollectionPrologue();
   static void GarbageCollectionEpilogue();
 
-  // Code that should be executed after the garbage collection proper.
-  static void PostGarbageCollectionProcessing();
-
   // Performs garbage collection operation.
   // Returns whether required_space bytes are available after the collection.
   static bool CollectGarbage(int required_space, AllocationSpace space);