Drop time from media::{Audio,Video}Renderer::StartPlayingFrom().

media/base/video_renderer.h

Index: media/base/video_renderer.h
diff --git a/media/base/video_renderer.h b/media/base/video_renderer.h
index 2e36c7f56d1a31b8704c75260d7ad84cc9225950..a3f7b079cc9e141061b54f53aa7d8a61ef247874 100644
--- a/media/base/video_renderer.h
+++ b/media/base/video_renderer.h
@@ -66,10 +66,9 @@ class MEDIA_EXPORT VideoRenderer {
   virtual void Flush(const base::Closure& callback) = 0;
 
   // Starts playback by reading from |stream| and decoding and rendering video.
-  // |timestamp| is the media timestamp playback should start rendering from.
   //
   // Only valid to call after a successful Initialize() or Flush().
-  virtual void StartPlayingFrom(base::TimeDelta timestamp) = 0;
+  virtual void StartPlaying() = 0;
 
   // Stop all operations in preparation for being deleted, executing |callback|
   // when complete.