Report timing statistics for audio controller methods via UMA.

media/base/scoped_histogram_timer_unittest.cc

Index: media/base/scoped_histogram_timer_unittest.cc
diff --git a/media/base/scoped_histogram_timer_unittest.cc b/media/base/scoped_histogram_timer_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..191a577dfac2849e930599e667cec7510e6cae94
--- /dev/null
+++ b/media/base/scoped_histogram_timer_unittest.cc
@@ -0,0 +1,16 @@
+// Copyright 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.
+
+#include "base/time.h"
+#include "media/base/scoped_histogram_timer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media {
+
+TEST(ScopedHistogramTimer, TwoTimersOneScope) {
+  SCOPED_UMA_HISTOGRAM_TIMER("TestTimer0");
+  SCOPED_UMA_HISTOGRAM_TIMER("TestTimer1");
+}
+
+}  // namespace media