Update from https://crrev.com/316786

gpu/perftests/measurements.h

Index: gpu/perftests/measurements.h
diff --git a/gpu/perftests/measurements.h b/gpu/perftests/measurements.h
new file mode 100644
index 0000000000000000000000000000000000000000..15be4228a9cf6435ba7dba6ca7b55702e1af7e37
--- /dev/null
+++ b/gpu/perftests/measurements.h
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+// 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"
+#include "base/time/time.h"
+#include "gpu/command_buffer/service/gpu_timing.h"
+#include "ui/gl/gl_bindings.h"
+
+namespace gpu {
+struct Measurement {
+  Measurement();
+  Measurement(const Measurement& m);
+  Measurement(const std::string& name,
+              const base::TimeDelta wall_time,
+              const base::TimeDelta cpu_time,
+              const base::TimeDelta gpu_time);
+  ~Measurement();
+
+  void PrintResult() const;
+  Measurement& Increment(const Measurement& m);
+  Measurement Divide(int a) const;
+
+  std::string name;
+  base::TimeDelta wall_time;
+  base::TimeDelta cpu_time;
+  base::TimeDelta gpu_time;
+};
+
+// Class to measure wall, cpu and gpu time deltas.
+// The deltas are measured from the time of the object
+// creation up to when Record is called.
+class MeasurementTimers {
+ public:
+  explicit MeasurementTimers(GPUTiming* gpu_timing);
+  void Record();
+  Measurement GetAsMeasurement(const std::string& name);
+  ~MeasurementTimers();
+
+ private:
+  base::TimeTicks wall_time_start_;
+  base::TimeTicks cpu_time_start_;
+  scoped_ptr<gpu::GPUTimer> gpu_timer_;
+
+  base::TimeDelta wall_time_;
+  base::TimeDelta cpu_time_;
+};
+
+}  // namespace gpu
+
+#endif  // GPU_PERFTESTS_MEASUREMENTS_H_