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

webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc

 /*
  *  Copyright (c) 2012 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 131 matching lines @@
     int stride_uv;
     int stride_y;
     Calc16ByteAlignedStride(codec_inst_.width, &stride_y, &stride_uv);
     EXPECT_EQ(stride_y, 176);
     EXPECT_EQ(stride_uv, 96);
 
     rtc::scoped_refptr<I420Buffer> stride_buffer(
         I420Buffer::Create(kWidth, kHeight, stride_y, stride_uv, stride_uv));
 
     // No scaling in our case, just a copy, to add stride to the image.
-    stride_buffer->ScaleFrom(compact_buffer);
+    stride_buffer->ScaleFrom(*compact_buffer);
 
     input_frame_.reset(
         new VideoFrame(stride_buffer, kVideoRotation_0, 0));
     input_frame_->set_timestamp(kTestTimestamp);
   }
 
   void SetUpEncodeDecode() {
     codec_inst_.startBitrate = 300;
     codec_inst_.maxBitrate = 4000;
     codec_inst_.qpMax = 56;
@@ skipping 106 matching lines @@
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_ERROR,
             decoder_->Decode(encoded_frame_, false, NULL));
   // Now setting a key frame.
   encoded_frame_._frameType = kVideoFrameKey;
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
             decoder_->Decode(encoded_frame_, false, NULL));
   EXPECT_GT(I420PSNR(input_frame_.get(), &decoded_frame_), 36);
 }
 
 }  // namespace webrtc