Prevent Pepper plugin reentrncy for synchronous messages.

ppapi/proxy/host_dispatcher.h

 // Copyright (c) 2010 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 PPAPI_PROXY_HOST_DISPATCHER_H_
 #define PPAPI_PROXY_HOST_DISPATCHER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 41 matching lines @@
   // Returns the host's notion of our PP_Module. This will be different than
   // the plugin's notion of its PP_Module because the plugin process may be
   // used by multiple renderer processes.
   //
   // Use this value instead of a value from the plugin whenever talking to the
   // host.
   PP_Module pp_module() const { return pp_module_; }
 
   // Dispatcher overrides.
   virtual bool IsPlugin() const;
+  virtual bool Send(IPC::Message* msg);
 
   // IPC::Channel::Listener.
   virtual bool OnMessageReceived(const IPC::Message& msg);
   virtual void OnChannelError();
 
   // Proxied version of calling GetInterface on the plugin. This will check
   // if the plugin supports the given interface (with caching) and returns the
   // pointer to the proxied interface if it is supported. Returns NULL if the
   // given interface isn't supported by the plugin or the proxy.
   const void* GetProxiedInterface(const std::string& interface);
@@ skipping 32 matching lines @@
   // Lazily initialized, may be NULL. Use GetPPBProxy().
   const PPB_Proxy_Private* ppb_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(HostDispatcher);
 };
 
 }  // namespace proxy
 }  // namespace pp
 
 #endif  // PPAPI_PROXY_HOST_DISPATCHER_H_