Combine boolean MediaDeviceNotifications histograms to an enumerated histogram.

chrome/browser/system_monitor/removable_device_notifications_histogram.h

+// Copyright (c) 2012 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.
+
+// Common code shared between RemovableDeviceNotifications{Win,Linux,Mac,
+// ChromeOS} to record MediaDeviceNotification.DeviceInfo histogram.
+
+#ifndef CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_HISTOGRAM_H_
+#define CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_HISTOGRAM_H_
+
+#include "chrome/browser/system_monitor/media_storage_util.h"
+
+namespace chrome {
+
+// Record device information histogram for the given |device_type|,
+// |device_uuid| and |device_name|.
+void RecordDeviceInfoHistogram(MediaStorageUtil::Type device_type,
+                               const std::string& device_uuid,
+                               const string16& device_name);
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_HISTOGRAM_H_