Accurate transfer of SerializedScriptValue allocation costs.

third_party/WebKit/Source/bindings/core/v8/custom/V8WindowCustom.cpp

 /*
  * Copyright (C) 2009, 2011 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 266 matching lines @@
   // TODO(foolip): targetOrigin should be a USVString in IDL and treated as
   // such here, without TreatNullAndUndefinedAsNullString.
   TOSTRING_VOID(V8StringResource<TreatNullAndUndefinedAsNullString>,
                 targetOrigin, info[targetOriginArgIndex]);
 
   RefPtr<SerializedScriptValue> message = SerializedScriptValue::serialize(
       info.GetIsolate(), info[0], &transferables, nullptr, exceptionState);
   if (exceptionState.hadException())
     return;
 
+  message->unregisterMemoryAllocatedWithCurrentScriptContext();
   window->postMessage(message.get(), transferables.messagePorts, targetOrigin,
                       source, exceptionState);
-  message->unregisterMemoryAllocatedByCurrentScriptContext();
 }
 
 void V8Window::openMethodCustom(
     const v8::FunctionCallbackInfo<v8::Value>& info) {
   DOMWindow* impl = V8Window::toImpl(info.Holder());
   ExceptionState exceptionState(
       info.GetIsolate(), ExceptionState::ExecutionContext, "Window", "open");
   if (!BindingSecurity::shouldAllowAccessTo(currentDOMWindow(info.GetIsolate()),
                                             impl, exceptionState)) {
     return;
@@ skipping 93 matching lines @@
     if (items->hasExactlyOneItem()) {
       v8SetReturnValueFast(info, items->item(0), window);
       return;
     }
     v8SetReturnValueFast(info, items, window);
     return;
   }
 }
 
 }  // namespace blink