Chromecast: adds class to help record complex histograms.

chromecast/base/metrics/cast_metrics_test_helper.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 CHROMECAST_BASE_METRICS_CAST_METRICS_TEST_HELPER_H_
+#define CHROMECAST_BASE_METRICS_CAST_METRICS_TEST_HELPER_H_
+
+namespace chromecast {
+namespace metrics {
+
+// Creates and initializes a metrics helper stub for the current process, in
+// which all operations are no-ops. May be safely called multiple times per
+// process.
+void InitializeMetricsHelperForTesting();
+
+}  // namespace metrics
+}  // namespace chromecast
+
+#endif  // CHROMECAST_BASE_METRICS_CAST_METRICS_TEST_HELPER_H_