Remove unused VideoFrameCapturer::size_most_recent() method.

remoting/host/ipc_video_frame_capturer.h

Index: remoting/host/ipc_video_frame_capturer.h
diff --git a/remoting/host/ipc_video_frame_capturer.h b/remoting/host/ipc_video_frame_capturer.h
index e942028c53fe65615e0b9f4e3dd771967f0d56ad..ba5c51784d03c0d96590f009453d6f22a1073b75 100644
--- a/remoting/host/ipc_video_frame_capturer.h
+++ b/remoting/host/ipc_video_frame_capturer.h
@@ -30,7 +30,6 @@ class IpcVideoFrameCapturer : public VideoFrameCapturer {
   virtual void Stop() OVERRIDE;
   virtual void InvalidateRegion(const SkRegion& invalid_region) OVERRIDE;
   virtual void CaptureFrame() OVERRIDE;
-  virtual const SkISize& size_most_recent() const OVERRIDE;
 
   // Called when a video frame has been captured. |capture_data| describes
   // a captured frame.
@@ -46,9 +45,6 @@ class IpcVideoFrameCapturer : public VideoFrameCapturer {
   // Wraps the IPC channel to the desktop session agent.
   scoped_refptr<DesktopSessionProxy> desktop_session_proxy_;
 
-  // Size of the most recent captured frame.
-  SkISize size_most_recent_;
-
   DISALLOW_COPY_AND_ASSIGN(IpcVideoFrameCapturer);
 };