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 02f30a95d14802a0722f564afd30fb2026a547ee..b12c862c3964bcb56ce4992529510f0ccbf588f5 100644
--- a/media/base/pipeline.cc
+++ b/media/base/pipeline.cc
@@ -681,8 +681,7 @@ 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() {