Cleanups in cricket::VideoFrame and cricket::WebRtcVideoFrame.

webrtc/media/engine/webrtcvideoframe.cc

Index: webrtc/media/engine/webrtcvideoframe.cc
diff --git a/webrtc/media/engine/webrtcvideoframe.cc b/webrtc/media/engine/webrtcvideoframe.cc
index 4f89c8b85d100562d14cb891c6b11e8f67f247d1..091adc3c9ac26ad49ab6865fbe104d7e87373390 100644
--- a/webrtc/media/engine/webrtcvideoframe.cc
+++ b/webrtc/media/engine/webrtcvideoframe.cc
@@ -149,26 +149,11 @@ bool WebRtcVideoFrame::Reset(uint32_t format,
   return true;
 }
 
-VideoFrame* WebRtcVideoFrame::CreateEmptyFrame(int w,
-                                               int h,
-                                               int64_t timestamp_us) const {
-  WebRtcVideoFrame* frame = new WebRtcVideoFrame();
-  frame->InitToEmptyBuffer(w, h, rtc::kNumNanosecsPerMicrosec * timestamp_us);
-  return frame;
-}
-
 void WebRtcVideoFrame::InitToEmptyBuffer(int w, int h) {
   video_frame_buffer_ = new rtc::RefCountedObject<webrtc::I420Buffer>(w, h);
   rotation_ = webrtc::kVideoRotation_0;
 }
 
-void WebRtcVideoFrame::InitToEmptyBuffer(int w, int h,
-                                         int64_t time_stamp_ns) {
-  video_frame_buffer_ = new rtc::RefCountedObject<webrtc::I420Buffer>(w, h);
-  SetTimeStamp(time_stamp_ns);
-  rotation_ = webrtc::kVideoRotation_0;
-}
-
 const VideoFrame* WebRtcVideoFrame::GetCopyWithRotationApplied() const {
   // If the frame is not rotated, the caller should reuse this frame instead of
   // making a redundant copy.
@@ -197,7 +182,9 @@ const VideoFrame* WebRtcVideoFrame::GetCopyWithRotationApplied() const {
   }
 
   rotated_frame_.reset(
-      CreateEmptyFrame(rotated_width, rotated_height, timestamp_us_));
+      new WebRtcVideoFrame(new rtc::RefCountedObject<webrtc::I420Buffer>(
+                               rotated_width, rotated_height),
+                           webrtc::kVideoRotation_0, timestamp_us_));
 
   // TODO(guoweis): Add a function in webrtc_libyuv.cc to convert from
   // VideoRotation to libyuv::RotationMode.