It is time.

ui/events/ozone/device/device_manager.h

Index: ui/events/ozone/device/device_manager.h
diff --git a/ui/events/ozone/device/device_manager.h b/ui/events/ozone/device/device_manager.h
deleted file mode 100644
index 0551e7ecf8bb783acc7201fa64140ce608dcf407..0000000000000000000000000000000000000000
--- a/ui/events/ozone/device/device_manager.h
+++ /dev/null
@@ -1,36 +0,0 @@
-// 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 UI_EVENTS_OZONE_DEVICE_DEVICE_MANAGER_H_
-#define UI_EVENTS_OZONE_DEVICE_DEVICE_MANAGER_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/events/ozone/events_ozone_export.h"
-
-namespace ui {
-
-class DeviceEventObserver;
-
-class EVENTS_OZONE_EXPORT DeviceManager {
- public:
-  virtual ~DeviceManager() {}
-
-  // Scans the currently available devices and notifies |observer| for each
-  // device found. If also registering for notifications through AddObserver(),
-  // the scan should happen after the registration otherwise the observer may
-  // miss events.
-  virtual void ScanDevices(DeviceEventObserver* observer) = 0;
-
-  // Registers |observer| for device event notifications.
-  virtual void AddObserver(DeviceEventObserver* observer) = 0;
-
-  // Removes |observer| from the list of observers notified.
-  virtual void RemoveObserver(DeviceEventObserver* observer) = 0;
-};
-
-EVENTS_OZONE_EXPORT scoped_ptr<DeviceManager> CreateDeviceManager();
-
-}  // namespace ui
-
-#endif  // UI_EVENTS_OZONE_DEVICE_DEVICE_MANAGER_H_