Kills TraceTicks, which was functionally the same as TimeTicks

gpu/perftests/measurements.h

 // Copyright 2015 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 GPU_PERFTESTS_MEASUREMENTS_H_
 #define GPU_PERFTESTS_MEASUREMENTS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 29 matching lines @@
 // The deltas are measured from the time of the object
 // creation up to when Record is called.
 class MeasurementTimers {
  public:
   explicit MeasurementTimers(gfx::GPUTimingClient* gpu_timing_client);
   void Record();
   Measurement GetAsMeasurement(const std::string& name);
   ~MeasurementTimers();
 
  private:
-  base::TraceTicks wall_time_start_;
+  base::TimeTicks wall_time_start_;
   base::ThreadTicks cpu_time_start_;
   scoped_ptr<gfx::GPUTimer> gpu_timer_;
 
   base::TimeDelta wall_time_;
   base::TimeDelta cpu_time_;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_PERFTESTS_MEASUREMENTS_H_