Don't send PP_Vars/V8 values with cycles across PostMessage

webkit/plugins/ppapi/message_channel.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_PLUGINS_PPAPI_MESSAGE_CHANNEL_H_
 #define WEBKIT_PLUGINS_PPAPI_MESSAGE_CHANNEL_H_
 
 #include <deque>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 35 matching lines @@
   };
 
   explicit MessageChannel(PluginInstance* instance);
   ~MessageChannel();
 
   // Post a message to the onmessage handler for this channel's instance
   // asynchronously.
   void PostMessageToJavaScript(PP_Var message_data);
   // Post a message to the PPP_Instance HandleMessage function for this
   // channel's instance.
-  void PostMessageToNative(PP_Var message_data);
+  void PostMessageToNative(PP_Var message_data,
+                           bool success,
+                           const std::string& error);
 
   // Return the NPObject* to which we should forward any calls which aren't
   // related to postMessage.  Note that this can be NULL;  it only gets set if
   // there is a scriptable 'InstanceObject' associated with this channel's
   // instance.
   NPObject* passthrough_object() {
     return passthrough_object_;
   }
   void SetPassthroughObject(NPObject* passthrough);
 
@@ skipping 47 matching lines @@
   };
   EarlyMessageQueueState early_message_queue_state_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageChannel);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_MESSAGE_CHANNEL_H_