Update VideoFrameBuffer-related methods to not use references to scoped_refptr.

webrtc/modules/video_coding/utility/quality_scaler.cc

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 169 matching lines @@
     const rtc::scoped_refptr<VideoFrameBuffer>& frame) {
   Resolution res = GetScaledResolution();
   const int src_width = frame->width();
   const int src_height = frame->height();
 
   if (res.width == src_width && res.height == src_height)
     return frame;
   rtc::scoped_refptr<I420Buffer> scaled_buffer =
       pool_.CreateBuffer(res.width, res.height);
 
-  scaled_buffer->ScaleFrom(frame);
+  scaled_buffer->ScaleFrom(*frame);
 
   return scaled_buffer;
 }
 
 void QualityScaler::UpdateTargetResolution(int width, int height) {
   if (width < kMinDownscaleDimension || height < kMinDownscaleDimension) {
     maximum_shift_ = 0;
   } else {
     maximum_shift_ = static_cast<int>(
         log2(std::min(width, height) / kMinDownscaleDimension));
   }
   target_res_ = Resolution{width, height};
 }
 
 void QualityScaler::ClearSamples() {
   framedrop_percent_.Reset();
   average_qp_.Reset();
 }
 
 
 }  // namespace webrtc