Provide API support for weak handles and post-mortem finalization.

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
diff --git a/runtime/vm/isolate.cc b/runtime/vm/isolate.cc
index 6a5e829711e65f7f50b98f35da25ac0cca7cad41..4b3993b2e564773288f554ea4087378a9b7591ee 100644
--- a/runtime/vm/isolate.cc
+++ b/runtime/vm/isolate.cc
@@ -333,13 +333,6 @@ RawObject* Isolate::StandardRunLoop() {
 
 void Isolate::VisitObjectPointers(ObjectPointerVisitor* visitor,
                                   bool validate_frames) {
-  VisitStrongObjectPointers(visitor, validate_frames);
-  VisitWeakObjectPointers(visitor);
-}
-
-
-void Isolate::VisitStrongObjectPointers(ObjectPointerVisitor* visitor,
-                                        bool validate_frames) {
   ASSERT(visitor != NULL);
 
   // Visit objects in the object store.
@@ -361,7 +354,7 @@ void Isolate::VisitStrongObjectPointers(ObjectPointerVisitor* visitor,
 
   // Visit the dart api state for all local and persistent handles.
   if (api_state() != NULL) {
-    api_state()->VisitStrongObjectPointers(visitor);
+    api_state()->VisitObjectPointers(visitor);
   }
 
   // Visit all objects in the code index table.
@@ -377,9 +370,9 @@ void Isolate::VisitStrongObjectPointers(ObjectPointerVisitor* visitor,
 }
 
 
-void Isolate::VisitWeakObjectPointers(ObjectPointerVisitor* visitor) {
+void Isolate::VisitWeakPersistentHandles(HandleVisitor* visitor) {
   if (api_state() != NULL) {
-    api_state()->VisitWeakObjectPointers(visitor);
+    api_state()->VisitWeakHandles(visitor);
   }
 }