Revert of Remove media::VideoRenderer::SetPlaybackRate().

media/base/pipeline_unittest.cc

Index: media/base/pipeline_unittest.cc
diff --git a/media/base/pipeline_unittest.cc b/media/base/pipeline_unittest.cc
index 17da20292137a0f39817f0aa79d0d5f56c6d1ae9..41d670458b466e9662aa318b0e534278cca71bfc 100644
--- a/media/base/pipeline_unittest.cc
+++ b/media/base/pipeline_unittest.cc
@@ -208,6 +208,7 @@
       }
 
       if (video_stream_) {
+        EXPECT_CALL(*video_renderer_, SetPlaybackRate(0.0f));
         EXPECT_CALL(*video_renderer_, StartPlayingFrom(base::TimeDelta()))
             .WillOnce(SetBufferingState(&video_buffering_state_cb_,
                                         BUFFERING_HAVE_ENOUGH));
@@ -284,6 +285,7 @@
       EXPECT_CALL(*video_renderer_, StartPlayingFrom(seek_time))
           .WillOnce(SetBufferingState(&video_buffering_state_cb_,
                                       BUFFERING_HAVE_ENOUGH));
+      EXPECT_CALL(*video_renderer_, SetPlaybackRate(_));
     }
 
     // We expect a successful seek callback followed by a buffering update.
@@ -629,6 +631,7 @@
   EXPECT_EQ(0, pipeline_->GetMediaTime().ToInternalValue());
 
   float playback_rate = 1.0f;
+  EXPECT_CALL(*video_renderer_, SetPlaybackRate(playback_rate));
   EXPECT_CALL(*audio_renderer_, SetPlaybackRate(playback_rate));
   pipeline_->SetPlaybackRate(playback_rate);
   message_loop_.RunUntilIdle();
@@ -997,6 +1000,7 @@
                                     BUFFERING_HAVE_ENOUGH));
 
     EXPECT_CALL(*audio_renderer_, SetPlaybackRate(0.0f));
+    EXPECT_CALL(*video_renderer_, SetPlaybackRate(0.0f));
     EXPECT_CALL(*audio_renderer_, SetVolume(1.0f));
     EXPECT_CALL(*audio_renderer_, StartRendering());