Update from https://crrev.com/333737

cc/debug/lap_timer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_DEBUG_LAP_TIMER_H_
 #define CC_DEBUG_LAP_TIMER_H_
 
 #include "base/time/time.h"
 
 namespace cc {
@@ skipping 28 matching lines @@
   // lap, where n = check_interval.
   bool HasTimedAllLaps();
   // The average milliseconds per lap.
   float MsPerLap();
   // The number of laps per second.
   float LapsPerSecond();
   // The number of laps recorded.
   int NumLaps();
 
  private:
-  base::TimeTicks start_time_;
+  base::TimeDelta start_time_;
   base::TimeDelta accumulator_;
   int num_laps_;
   int warmup_laps_;
   int remaining_warmups_;
   int remaining_no_check_laps_;
   base::TimeDelta time_limit_;
   int check_interval_;
 
   DISALLOW_COPY_AND_ASSIGN(LapTimer);
 };
 
 }  // namespace cc
 
 #endif  // CC_DEBUG_LAP_TIMER_H_