Cleanup: Remove unneeded forward declarations in ppapi.

ppapi/proxy/ppapi_param_traits.h

 // Copyright (c) 2011 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_PPAPI_PARAM_TRAITS_H_
 #define PPAPI_PROXY_PPAPI_PARAM_TRAITS_H_
 
 #include <string>
 #include <vector>
 
 #include "ipc/ipc_message_utils.h"
 #include "ipc/ipc_platform_file.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_rect.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
 #include "ppapi/shared_impl/file_ref_impl.h"
 
 struct PP_FileInfo;
 struct PP_ObjectProperty;
-struct PP_Flash_Menu;
 struct PP_NetAddress_Private;
 
 namespace ppapi {
 
 class HostResource;
 //struct PPB_FileRef_CreateInfo;
 
 namespace proxy {
 
 struct PPBFlash_DrawGlyphs_Params;
@@ skipping 116 matching lines @@
 struct ParamTraits<ppapi::proxy::SerializedFlashMenu> {
   typedef ppapi::proxy::SerializedFlashMenu param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, void** iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 
 }  // namespace IPC
 
 #endif  // PPAPI_PROXY_PPAPI_PARAM_TRAITS_H_