Add a new weak handle callback that passes an Isolate to an embedder

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 628 matching lines @@
 void V8::MakeWeak(i::Object** object, void* parameters,
                   WeakReferenceCallback callback) {
   i::Isolate* isolate = i::Isolate::Current();
   LOG_API(isolate, "MakeWeak");
   isolate->global_handles()->MakeWeak(object, parameters,
                                       callback);
 }
 
 
 void V8::MakeWeak(i::Isolate* isolate, i::Object** object,
-                  void* parameters, WeakReferenceCallback callback) {
+                  void* parameters, WeakHandleCallback callback) {
   ASSERT(isolate == i::Isolate::Current());
   LOG_API(isolate, "MakeWeak");
   isolate->global_handles()->MakeWeak(object, parameters,
                                       callback);
 }
 
 
 void V8::ClearWeak(i::Object** obj) {
   i::Isolate* isolate = i::Isolate::Current();
   LOG_API(isolate, "ClearWeak");
@@ skipping 6079 matching lines @@
 
   v->VisitPointers(blocks_.first(), first_block_limit_);
 
   for (int i = 1; i < blocks_.length(); i++) {
     v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]);
   }
 }
 
 
 } }  // namespace v8::internal