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

base/test/mock_devices_changed_observer.cc

Index: base/test/mock_devices_changed_observer.cc
===================================================================
--- base/test/mock_devices_changed_observer.cc	(revision 124333)
+++ base/test/mock_devices_changed_observer.cc	(working copy)
@@ -1,17 +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.
-
-#include "base/test/mock_devices_changed_observer.h"
-
-#include "base/file_path.h"
-
-namespace base {
-
-MockDevicesChangedObserver::MockDevicesChangedObserver() {
-}
-
-MockDevicesChangedObserver::~MockDevicesChangedObserver() {
-}
-
-}  // namespace base