Switch GetWallClockTime to using vectors for input and output.

media/renderers/video_renderer_impl.h

Index: media/renderers/video_renderer_impl.h
diff --git a/media/renderers/video_renderer_impl.h b/media/renderers/video_renderer_impl.h
index d174c8ad2bdd67447fe38a1040a88ef234c3dadd..e6220b972426bcb920c102aa7f1ed58bec4aac73 100644
--- a/media/renderers/video_renderer_impl.h
+++ b/media/renderers/video_renderer_impl.h
@@ -65,7 +65,7 @@ class MEDIA_EXPORT VideoRendererImpl
                   const BufferingStateCB& buffering_state_cb,
                   const base::Closure& ended_cb,
                   const PipelineStatusCB& error_cb,
-                  const WallClockTimeCB& wall_clock_time_cb,
+                  const TimeSource::WallClockTimeCB& wall_clock_time_cb,
                   const base::Closure& waiting_for_decryption_key_cb) override;
   void Flush(const base::Closure& callback) override;
   void StartPlayingFrom(base::TimeDelta timestamp) override;
@@ -150,6 +150,9 @@ class MEDIA_EXPORT VideoRendererImpl
   // does so.  Returns algorithm_->EffectiveFramesQueued().
   size_t MaybeFireEndedCallback();
 
+  // Helper method for converting a single media timestamp to wall clock time.
+  base::TimeTicks ConvertMediaTimestamp(base::TimeDelta media_timestamp);
+
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   // Enables the use of VideoRendererAlgorithm and VideoRendererSink for frame
@@ -232,7 +235,7 @@ class MEDIA_EXPORT VideoRendererImpl
   BufferingStateCB buffering_state_cb_;
   base::Closure ended_cb_;
   PipelineStatusCB error_cb_;
-  WallClockTimeCB wall_clock_time_cb_;
+  TimeSource::WallClockTimeCB wall_clock_time_cb_;
 
   base::TimeDelta start_timestamp_;