content: Cleanup class/struct forward declarations

content/renderer/pepper/pepper_file_chooser_host.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_PEPPER_FILE_CHOOSER_HOST_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_FILE_CHOOSER_HOST_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
 #include "ppapi/host/host_message_context.h"
 #include "ppapi/host/resource_host.h"
 #include "ppapi/proxy/resource_message_params.h"
 
-namespace ppapi {
-struct FileRefCreateInfo;
-}
-
 namespace content {
 
 class RendererPpapiHost;
-class RenderViewImpl;
 
 class CONTENT_EXPORT PepperFileChooserHost
     : public ppapi::host::ResourceHost,
       public base::SupportsWeakPtr<PepperFileChooserHost> {
  public:
   // Structure to store the information about chosen files.
   struct ChosenFileInfo {
     ChosenFileInfo(const std::string& path, const std::string& display_name);
     std::string path;
     std::string display_name;  // May be empty.
@@ skipping 30 matching lines @@
   CompletionHandler* handler_;
 
   base::WeakPtrFactory<PepperFileChooserHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperFileChooserHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_FILE_CHOOSER_HOST_H_