content: Cleanup class/struct forward declarations

content/public/renderer/renderer_ppapi_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_PUBLIC_RENDERER_RENDERER_PPAPI_HOST_H_
 #define CONTENT_PUBLIC_RENDERER_RENDERER_PPAPI_HOST_H_
 
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/files/file.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_platform_file.h"
 #include "ppapi/c/pp_instance.h"
 #include "url/gurl.h"
 
-namespace base {
-class FilePath;
-}
-
 namespace gfx {
 class Point;
 }
 
 namespace IPC {
 class Message;
 }
 
 namespace ppapi {
 namespace host {
@@ skipping 133 matching lines @@
   // interface. Consider changing them to static helpers.
   virtual GURL GetDocumentURL(PP_Instance instance) const = 0;
 
  protected:
   virtual ~RendererPpapiHost() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDERER_PPAPI_HOST_H_