ppapi: Cleanup class/struct forward declarations

ppapi/thunk/resource_creation_api.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 PPAPI_THUNK_RESOURCE_CREATION_API_H_
 #define PPAPI_THUNK_RESOURCE_CREATION_API_H_
 
 #include <stdint.h>
 
 #include "base/memory/shared_memory.h"
@@ skipping 27 matching lines @@
 namespace gpu {
 namespace gles2 {
 struct ContextCreationAttribHelper;
 }
 struct Capabilities;
 }
 
 namespace ppapi {
 
 struct FileRefCreateInfo;
-struct URLRequestInfoData;
-struct URLResponseInfoData;
 
 namespace thunk {
 
 // A functional API for creating resource types. Separating out the creation
 // functions here allows us to implement most resources as a pure "resource
 // API", meaning all calls are routed on a per-resource-object basis. The
 // creation functions are not per-object (since there's no object during
 // creation) so need functional routing based on the instance ID.
 class ResourceCreationAPI {
  public:
@@ skipping 149 matching lines @@
       PP_VideoDecoder_Profile profile) = 0;
 #endif  // !defined(OS_NACL)
 
   static const ApiID kApiID = API_ID_RESOURCE_CREATION;
 };
 
 }  // namespace thunk
 }  // namespace ppapi
 
 #endif  // PPAPI_THUNK_RESOURCE_CREATION_API_H_