Lint enabled for webrtc/modules/video_coding folder.

webrtc/modules/video_coding/timing.h

Index: webrtc/modules/video_coding/timing.h
diff --git a/webrtc/modules/video_coding/timing.h b/webrtc/modules/video_coding/timing.h
index 46681a3a0733528f8478abc941f05b696716a58e..a4d0cf45433b34f7b8c3b6bfd62e271fd551986a 100644
--- a/webrtc/modules/video_coding/timing.h
+++ b/webrtc/modules/video_coding/timing.h
@@ -25,8 +25,7 @@ class VCMTiming {
  public:
   // The primary timing component should be passed
   // if this is the dual timing component.
-  VCMTiming(Clock* clock,
-            VCMTiming* master_timing = NULL);
+  explicit VCMTiming(Clock* clock, VCMTiming* master_timing = NULL);
   ~VCMTiming();
 
   // Resets the timing to the initial state.