Switch to using media::TimeSource inside media::RendererImpl.

media/base/pipeline.cc

Index: media/base/pipeline.cc
diff --git a/media/base/pipeline.cc b/media/base/pipeline.cc
index 6e680d528a70bc64922c7d78a497aae291673e5a..086dd9651b16cdc4f7106d9a44e404ab23a8fa3c 100644
--- a/media/base/pipeline.cc
+++ b/media/base/pipeline.cc
@@ -690,8 +690,7 @@ void Pipeline::InitializeRenderer(const base::Closure& done_cb) {
       base::Bind(&Pipeline::OnUpdateStatistics, weak_this),
       base::Bind(&Pipeline::OnRendererEnded, weak_this),
       base::Bind(&Pipeline::OnError, weak_this),
-      base::Bind(&Pipeline::BufferingStateChanged, weak_this),
-      base::Bind(&Pipeline::GetMediaDuration, base::Unretained(this)));
+      base::Bind(&Pipeline::BufferingStateChanged, weak_this));
 }
 
 void Pipeline::ReportMetadata() {