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

media/base/renderer.h

Index: media/base/renderer.h
diff --git a/media/base/renderer.h b/media/base/renderer.h
index 0034bf985f6df36856844d6a4fd66f11619d2b10..08c04848a086487189c19052390dd6d75dcd3559 100644
--- a/media/base/renderer.h
+++ b/media/base/renderer.h
@@ -37,8 +37,7 @@ class MEDIA_EXPORT Renderer {
                           const StatisticsCB& statistics_cb,
                           const base::Closure& ended_cb,
                           const PipelineStatusCB& error_cb,
-                          const BufferingStateCB& buffering_state_cb,
-                          const TimeDeltaCB& get_duration_cb) = 0;
+                          const BufferingStateCB& buffering_state_cb) = 0;
 
   // The following functions must be called after Initialize().