Implement evictFrames() to support MSE's coded frame eviction algorithm.

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index e5ac3c98ecf7692c3e10c91d88b8e9bb97886158..cfc9c69877b10299fd03111d5964db8dd364d4c4 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -951,6 +951,9 @@ void WebMediaPlayerImpl::StartPipeline() {
     chunk_demuxer_ = new ChunkDemuxer(
         BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnDemuxerOpened),
         encrypted_media_init_data_cb, mse_log_cb, media_log_, true);
+    chunk_demuxer_->SetMediaTimeProvider(
+        base::Bind(&media::Pipeline::GetMediaTime,
+                   base::Unretained(&pipeline_)));
     demuxer_.reset(chunk_demuxer_);
   }