Enable cpplint in media/

Bug: webrtc:5584
Change-Id: I2fd1395d35596d9002e19cc90fcda3a5d4cde9e7
Reviewed-on: https://webrtc-review.googlesource.com/16564
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20504}
diff --git a/media/base/videosinkinterface.h b/media/base/videosinkinterface.h
index e8e48d8..900e786 100644
--- a/media/base/videosinkinterface.h
+++ b/media/base/videosinkinterface.h
@@ -26,7 +26,7 @@
 
   // Should be called by the source when it discards the frame due to rate
   // limiting.
-  virtual void OnDiscardedFrame(){};
+  virtual void OnDiscardedFrame() {}
 };
 
 }  // namespace rtc