Index: chrome/browser/metrics/time_ticks_experiment_win.h |
diff --git a/chrome/browser/metrics/time_ticks_experiment_win.h b/chrome/browser/metrics/time_ticks_experiment_win.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d89b6750e31774ea6b1f83bbc28b1c6d4a48068e |
--- /dev/null |
+++ b/chrome/browser/metrics/time_ticks_experiment_win.h |
@@ -0,0 +1,24 @@ |
+// 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_ |