Revert 217768 "Adding key press detection in the browser process."

trunk/src/media/base/user_input_monitor_mac.mm

Index: trunk/src/media/base/user_input_monitor_mac.mm
===================================================================
--- trunk/src/media/base/user_input_monitor_mac.mm	(revision 217773)
+++ trunk/src/media/base/user_input_monitor_mac.mm	(working copy)
@@ -1,16 +0,0 @@
-// Copyright 2013 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 "media/base/user_input_monitor.h"
-
-namespace media {
-
-// TODO(jiayl): add the implementation.
-scoped_ptr<UserInputMonitor> UserInputMonitor::Create(
-    const scoped_refptr<base::SingleThreadTaskRunner>& input_task_runner,
-    const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner) {
-  return scoped_ptr<UserInputMonitor>();
-}
-
-}  // namespace media