Use libyuv for non-scaling RGB<->YUV conversions.

remoting/codec/video_decoder_vp8_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/codec/video_decoder_vp8.h"
 
 #include "media/base/video_frame.h"
 #include "remoting/codec/codec_test.h"
 #include "remoting/codec/video_encoder_vp8.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 16 matching lines @@
 };
 
 TEST_F(VideoDecoderVp8Test, VideoEncodeAndDecode) {
   TestVideoEncoderDecoder(&encoder_, &decoder_, false);
 }
 
 // Check that encoding and decoding a particular frame doesn't change the
 // frame too much. The frame used is a gradient, which does not contain sharp
 // transitions, so encoding lossiness should not be too high.
 TEST_F(VideoDecoderVp8Test, Gradient) {
-  TestGradient(320, 240, 320, 240, 0.03, 0.01);
+  TestGradient(320, 240, 320, 240, 0.04, 0.02);
 }
 
 TEST_F(VideoDecoderVp8Test, GradientScaleUpEvenToEven) {
   TestGradient(320, 240, 640, 480, 0.04, 0.02);
 }
 
 TEST_F(VideoDecoderVp8Test, GradientScaleUpEvenToOdd) {
   TestGradient(320, 240, 641, 481, 0.04, 0.02);
 }
 
@@ skipping 18 matching lines @@
 
 TEST_F(VideoDecoderVp8Test, GradientScaleDownOddToEven) {
   TestGradient(321, 241, 160, 120, 0.04, 0.02);
 }
 
 TEST_F(VideoDecoderVp8Test, GradientScaleDownOddToOdd) {
   TestGradient(321, 241, 161, 121, 0.04, 0.02);
 }
 
 }  // namespace remoting