Straightens outs DEPS in mojo/common

components/message_port.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'message_port',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
-        '../mojo/mojo_base.gyp:mojo_common_lib',
+        '../mojo/mojo_base.gyp:mojo_message_pump_lib',
         '../third_party/WebKit/public/blink.gyp:blink',
         '../third_party/mojo/mojo_public.gyp:mojo_system_cpp_headers',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'message_port/web_message_port_channel_impl.cc',
         'message_port/web_message_port_channel_impl.h',
       ],
     },
   ],
 }