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

webkit/plugins/ppapi/ppb_video_capture_impl.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_PPB_VIDEO_CAPTURE_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_VIDEO_CAPTURE_IMPL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_callback_factory.h"
 #include "base/memory/scoped_ptr.h"
 #include "media/video/capture/video_capture.h"
 #include "ppapi/c/dev/ppp_video_capture_dev.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/ppb_video_capture_api.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 #include "webkit/plugins/ppapi/ppb_buffer_impl.h"
 
 struct PP_VideoCaptureDeviceInfo_Dev;
-struct PPB_VideoCapture_Dev;
 
 namespace webkit {
 namespace ppapi {
 
 class PPB_VideoCapture_Impl : public ::ppapi::Resource,
                               public ::ppapi::thunk::PPB_VideoCapture_API,
                               public media::VideoCapture::EventHandler {
  public:
   explicit PPB_VideoCapture_Impl(PP_Instance instance);
   virtual ~PPB_VideoCapture_Impl();
@@ skipping 49 matching lines @@
   // |EventHandler| yet. It can be removed if/when |EventHandler| is made to be
   // refcounted (and made into a "member" of this object instead).
   bool is_dead_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_VideoCapture_Impl);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
-#endif  // WEBKIT_PLUGINS_PPAPI_PPB_VIDEO_DECODER_IMPL_H_
+#endif  // WEBKIT_PLUGINS_PPAPI_PPB_VIDEO_CAPTURE_IMPL_H_