Cleanup: Remove unneeded forward declarations in webkit/plugins/.

webkit/plugins/ppapi/plugin_delegate.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 WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_
 #define WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/message_loop_proxy.h"
 #include "base/memory/ref_counted.h"
 #include "base/platform_file.h"
 #include "base/shared_memory.h"
 #include "base/sync_socket.h"
 #include "base/time.h"
 #include "googleurl/src/gurl.h"
 #include "media/video/capture/video_capture.h"
 #include "media/video/video_decode_accelerator.h"
 #include "ppapi/c/dev/pp_video_dev.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_stdint.h"
 #include "ui/gfx/size.h"
 #include "webkit/fileapi/file_system_types.h"
 #include "webkit/plugins/ppapi/dir_contents.h"
 #include "webkit/quota/quota_types.h"
 
-class AudioMessageFilter;
 class GURL;
 struct PP_NetAddress_Private;
 class SkBitmap;
-class Task;
 class TransportDIB;
 
 namespace base {
 class MessageLoopProxy;
 class Time;
 }
 
-namespace content {
-class P2PSocketDispatcher;
-}
-
 namespace fileapi {
 class FileSystemCallbackDispatcher;
 }
 
 namespace gfx {
 class Point;
-class Rect;
 }
 
 namespace gpu {
 class CommandBuffer;
 }
 
 namespace ppapi {
 struct Preferences;
 }
 
@@ skipping 401 matching lines @@
   virtual void DidReceiveMouseEvent(PluginInstance* instance) = 0;
 
   // Determines if the browser entered fullscreen mode.
   virtual bool IsInFullscreenMode() = 0;
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_