Make painting a single frame a permanent API on VideoRendererSink.

media/test/pipeline_integration_test_base.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 "media/test/pipeline_integration_test_base.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
@@ skipping 336 matching lines @@
 
   return std::move(renderer_impl);
 }
 
 void PipelineIntegrationTestBase::OnVideoFramePaint(
     const scoped_refptr<VideoFrame>& frame) {
   last_video_frame_format_ = frame->format();
   int result;
   if (frame->metadata()->GetInteger(VideoFrameMetadata::COLOR_SPACE, &result))
     last_video_frame_color_space_ = static_cast<ColorSpace>(result);
-  if (!hashing_enabled_)
+  if (!hashing_enabled_ || last_frame_ == frame)
     return;
+  last_frame_ = frame;
   VideoFrame::HashFrameForTesting(&md5_context_, frame);
 }
 
 std::string PipelineIntegrationTestBase::GetVideoHash() {
   DCHECK(hashing_enabled_);
   base::MD5Digest digest;
   base::MD5Final(&digest, &md5_context_);
   return base::MD5DigestToBase16(digest);
 }
 
 std::string PipelineIntegrationTestBase::GetAudioHash() {
   DCHECK(hashing_enabled_);
 
   if (clockless_playback_)
     return clockless_audio_sink_->GetAudioHashForTesting();
   return audio_sink_->GetAudioHashForTesting();
 }
 
 base::TimeDelta PipelineIntegrationTestBase::GetAudioTime() {
   DCHECK(clockless_playback_);
   return clockless_audio_sink_->render_time();
 }
 
 base::TimeTicks DummyTickClock::NowTicks() {
   now_ += base::TimeDelta::FromSeconds(60);
   return now_;
 }
 
 }  // namespace media