CL for perf tryjob on linux

media/base/time_source.h

Index: media/base/time_source.h
diff --git a/media/base/time_source.h b/media/base/time_source.h
index 496eced81a4996f63a1162716df651ec27d6a8fc..c901f875dd5e8d0764ae6167e1ef0edb1aeaec7b 100644
--- a/media/base/time_source.h
+++ b/media/base/time_source.h
@@ -47,7 +47,7 @@ class MEDIA_EXPORT TimeSource {
   // Values returned are intended for informational purposes, such as displaying
   // UI with the current minute and second count. While it is guaranteed values
   // will never go backwards, the frequency at which they update may be low.
-  virtual base::TimeDelta CurrentMediaTime() = 0;
+  virtual base::TimeDelta CurrentMediaTime(base::TimeTicks* reference) = 0;
 
   // Converts a vector of media timestamps into a vector of wall clock times; if
   // the media time is stopped, returns false, otherwise returns true. Even if