| // Copyright (c) 2013 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 CHROME_BROWSER_METRICS_TIME_TICKS_EXPERIMENT_WIN_H_ |
| #define CHROME_BROWSER_METRICS_TIME_TICKS_EXPERIMENT_WIN_H_ |
| |
| #include "build/build_config.h" |
| |
| #if defined(OS_WIN) |
| |
| namespace chrome { |
| |
| // Runs an experiment once per session upon successful upload of UMA. Determines |
| // if QueryPerformanceCounter() is safe to use generally on this system. Ensures |
| // that the resolution is better than 1ms, returns quickly, and is monotonically |
| // increasing. Records the results in UMA for the next upload. |
| void CollectTimeTicksStats(); |
| |
| } // namespace chrome |
| |
| #endif // defined(OS_WIN) |
| |
| #endif // CHROME_BROWSER_METRICS_TIME_TICKS_EXPERIMENT_WIN_H_ |
