Revert 124288 (made mac browser and ui_tests flaky) - Add Media device notification to SystemMonito…

content/browser/mac/media_device_notifications.h

Index: content/browser/mac/media_device_notifications.h
===================================================================
--- content/browser/mac/media_device_notifications.h	(revision 124333)
+++ content/browser/mac/media_device_notifications.h	(working copy)
@@ -1,15 +0,0 @@
-// 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.
-
-#ifndef CONTENT_BROWSER_MAC_MEDIA_DEVICE_NOTIFICATIONS_H_
-#define CONTENT_BROWSER_MAC_MEDIA_DEVICE_NOTIFICATIONS_H_
-#pragma once
-
-namespace content {
-
-void StartMediaDeviceNotifications();
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_MAC_MEDIA_DEVICE_NOTIFICATIONS_H_