Pepper: Expose visible_rect to PPB_VideoDecoder.GetPicture.

ppapi/cpp/video_decoder.h

 // Copyright (c) 2014 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 PPAPI_CPP_VIDEO_DECODER_H_
 #define PPAPI_CPP_VIDEO_DECODER_H_
 
 #include "ppapi/c/pp_codecs.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/graphics_3d.h"
 #include "ppapi/cpp/resource.h"
 #include "ppapi/cpp/size.h"
 
 /// @file
 /// This file defines the API to create and use a VideoDecoder resource.
 
-struct PP_FileInfo;
-
 namespace pp {
 
 class InstanceHandle;
 
 /// Video decoder interface.
 ///
 /// Typical usage:
 /// - Call Create() to create a new video decoder resource.
 /// - Call Initialize() to initialize it with a 3d graphics context and the
 ///   desired codec profile.
@@ skipping 139 matching lines @@
   /// completion.
   ///
   /// @return An int32_t containing an error code from <code>pp_errors.h</code>.
     /// Returns PP_ERROR_FAILED if the decoder isn't initialized.
 int32_t Reset(const CompletionCallback& callback);
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_VIDEO_DECODER_H_