binding: Changes the association among global-proxy/global/window-instance (2nd attempt).

third_party/WebKit/Source/bindings/core/v8/DOMDataStore.h

 /*
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 118 matching lines @@
     DCHECK(!wrapper.IsEmpty());
     if (is_main_world_)
       return object->SetWrapper(isolate, wrapper_type_info, wrapper);
     return wrapper_map_->Set(object, wrapper_type_info, wrapper);
   }
 
   void MarkWrapper(ScriptWrappable* script_wrappable) {
     wrapper_map_->MarkWrapper(script_wrappable);
   }
 
+  // Dissociates a wrapper, if any, from |script_wrappable|.
+  void UnsetWrapperIfAny(ScriptWrappable* script_wrappable) {
+    DCHECK(!is_main_world_);
+    wrapper_map_->RemoveIfAny(script_wrappable);
+  }
+
   bool SetReturnValueFrom(v8::ReturnValue<v8::Value> return_value,
                           ScriptWrappable* object) {
     if (is_main_world_)
       return object->SetReturnValue(return_value);
     return wrapper_map_->SetReturnValueFrom(return_value, object);
   }
 
   bool ContainsWrapper(ScriptWrappable* object) {
     if (is_main_world_)
       return object->ContainsWrapper();
@@ skipping 35 matching lines @@
 template <>
 inline void
 DOMWrapperMap<ScriptWrappable>::PersistentValueMapTraits::DisposeWeak(
     const v8::WeakCallbackInfo<WeakCallbackDataType>&) {
   WrapperTypeInfo::WrapperDestroyed();
 }
 
 }  // namespace blink
 
 #endif  // DOMDataStore_h