Remove VideoDecoder::natural_size() & added VideoFrame::natural_size().

media/filters/video_renderer_base.h

Index: media/filters/video_renderer_base.h
diff --git a/media/filters/video_renderer_base.h b/media/filters/video_renderer_base.h
index 6bd2daec673d83901ff17d4b6742ad0ad90d42c5..276a24b4d45b981326a197d8fca29d995e1f06e2 100644
--- a/media/filters/video_renderer_base.h
+++ b/media/filters/video_renderer_base.h
@@ -116,6 +116,10 @@ class MEDIA_EXPORT VideoRendererBase
   // Return the number of frames currently held by this class.
   int NumFrames_Locked() const;
 
+  // Updates |current_frame_| to the next frame on |ready_frames_| and calls
+  // |size_changed_cb_| if the natural size changes.
+  void SetCurrentFrameToNextReadyFrame();
+
   // Used for accessing data members.
   base::Lock lock_;
 
@@ -228,6 +232,9 @@ class MEDIA_EXPORT VideoRendererBase
   // opaque.
   SetOpaqueCB set_opaque_cb_;
 
+  // The last natural size |size_changed_cb_| was called with.
+  gfx::Size last_natural_size_;
+
   DISALLOW_COPY_AND_ASSIGN(VideoRendererBase);
 };