Get high resolution frame timebase and interval on compatible systems

ui/gfx/frame_time.h

Index: ui/gfx/frame_time.h
diff --git a/ui/gfx/frame_time.h b/ui/gfx/frame_time.h
index 5cc65f5f4a883aa764140412313cace4078f4236..7e0b54ab672e7a505e34c59807909e5acf5be0b1 100644
--- a/ui/gfx/frame_time.h
+++ b/ui/gfx/frame_time.h
@@ -28,10 +28,7 @@ class FrameTime {
 #endif
 
   static bool TimestampsAreHighRes() {
-    // This should really return base::TimeTicks::IsHighResNowFastAndReliable();
-    // Returning false makes sure we are only using low-res timestamps until we
-    // use FrameTime everywhere we need to. See crbug.com/315334

[brianderson, 2014/10/22 23:05:29]

Note: This comment is a bit missleading. "until we use FrameTime everywhere"
should read "until we use the same timebase everywhere".

IsHighResClockWorking being true means that Now() is equivalent to HighResNow()
now, so we shouldn't have the timebase mismatch issues that we were having
before.

-    return false;
+    return base::TimeTicks::IsHighResClockWorking();
   }
 };