1 files changed, 54 insertions, 0 deletions
diff --git a/chromium/content/browser/media/session/media_session_uma_helper.h b/chromium/content/browser/media/session/media_session_uma_helper.h
new file mode 100644
index 00000000000..290c3b94a4c
--- /dev/null
+++ b/chromium/content/browser/media/session/media_session_uma_helper.h
@@ -0,0 +1,54 @@
+// 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 CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_UMA_HELPER_H_
+#define CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_UMA_HELPER_H_
+
+#include <memory>
+
+#include "base/time/clock.h"
+#include "content/common/content_export.h"
+
+namespace base {
+class Clock;
+}  // base namespace
+
+namespace content {
+
+class CONTENT_EXPORT MediaSessionUmaHelper {
+ public:
+  // This is used for UMA histogram (Media.Session.Suspended). New values should
+  // be appended only and must be added before |Count|.
+  enum class MediaSessionSuspendedSource {
+    SystemTransient = 0,
+    SystemPermanent = 1,
+    UI = 2,
+    CONTENT = 3,
+    SystemTransientDuck = 4,
+    Count // Leave at the end.
+  };
+
+  MediaSessionUmaHelper();
+  ~MediaSessionUmaHelper();
+
+  void RecordSessionSuspended(MediaSessionSuspendedSource source) const;
+
+  // Record the result of calling the native requestAudioFocus().
+  void RecordRequestAudioFocusResult(bool result) const;
+
+  void OnSessionActive();
+  void OnSessionSuspended();
+  void OnSessionInactive();
+
+  void SetClockForTest(std::unique_ptr<base::Clock> testing_clock);
+
+ private:
+  base::TimeDelta total_active_time_;
+  base::Time current_active_time_;
+  std::unique_ptr<base::Clock> clock_;
+};
+
+}  // namespace content
+
+#endif // CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_UMA_HELPER_H_