chromecast: Cleanup class/struct fwd declarations

chromecast/public/video_plane.h

 // Copyright 2015 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 CHROMECAST_PUBLIC_VIDEO_PLANE_H_
 #define CHROMECAST_PUBLIC_VIDEO_PLANE_H_
 
 namespace chromecast {
 struct RectF;
-struct Size;
 
 namespace media {
 
 class VideoPlane {
  public:
   // List of possible hardware transforms that can be applied to video.
   // Rotations are anticlockwise.
   enum Transform {
     TRANSFORM_NONE,
     ROTATE_90,
@@ skipping 10 matching lines @@
   // in screen resolution coordinates.
   // |transform| specifies how the video should be transformed within that
   // rectangle.
   virtual void SetGeometry(const RectF& screen_rect, Transform transform) = 0;
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_PUBLIC_VIDEO_PLANE_H_