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

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

Index: webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc b/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
index d636b14f503d1d41c620d92c3c312adf8e5a328a..2dafbf96b45b20a4cd706666e249bc90fed706d5 100644
--- a/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
@@ -149,7 +149,7 @@ class TestVp8Impl : public ::testing::Test {
         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));