Remove the old PPB_Flash proxy.

webkit/plugins/ppapi/ppb_flash_impl.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_PPB_FLASH_IMPL_H_
-#define WEBKIT_PLUGINS_PPAPI_PPB_FLASH_IMPL_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "build/build_config.h"
-#include "ppapi/thunk/ppb_flash_api.h"
-
-namespace webkit {
-namespace ppapi {
-
-class PluginInstance;
-
-class PPB_Flash_Impl : public ::ppapi::thunk::PPB_Flash_API {
- public:
-  explicit PPB_Flash_Impl(PluginInstance* instance);
-  virtual ~PPB_Flash_Impl();
-
-  DISALLOW_COPY_AND_ASSIGN(PPB_Flash_Impl);
-};
-
-}  // namespace ppapi
-}  // namespace webkit
-
-#endif  // WEBKIT_PLUGINS_PPAPI_PPB_FLASH_IMPL_H_