PPAPI: Make V8VarConverter longer-lived

content/renderer/pepper/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 CONTENT_RENDERER_PEPPER_MESSAGE_CHANNEL_H_
 #define CONTENT_RENDERER_PEPPER_MESSAGE_CHANNEL_H_
 
 #include <deque>
 #include <list>
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
+#include "content/renderer/pepper/v8_var_converter.h"
 #include "gin/handle.h"
 #include "gin/interceptor.h"
 #include "gin/wrappable.h"
 #include "ppapi/proxy/host_dispatcher.h"
 #include "ppapi/shared_impl/resource.h"
 #include "third_party/WebKit/public/web/WebSerializedScriptValue.h"
 #include "v8/include/v8.h"
 
 struct PP_Var;
 
@@ skipping 149 matching lines @@
   // preserves the order in which JS->plugin messages are processed.
   //
   // Note we rely on raw VarConversionResult* pointers remaining valid after
   // calls to push_back or pop_front; hence why we're using list. (deque would
   // probably also work, but is less clearly specified).
   std::list<VarConversionResult> plugin_message_queue_;
   MessageQueueState plugin_message_queue_state_;
 
   std::map<std::string, ppapi::ScopedPPVar> internal_named_properties_;
 
+  V8VarConverter var_converter_;
+
   // A callback to invoke at shutdown to ensure we unregister ourselves as
   // Observers for sync messages.
   base::Closure unregister_observer_callback_;
 
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<MessageChannel> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageChannel);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_MESSAGE_CHANNEL_H_