Refactoring: Move MessagePipeReader subclasess out from ChannelMojo

ipc/mojo/ipc_mojo.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
   ],
@@ skipping 10 matching lines @@
         '../ipc.gyp:ipc',
         '../../base/base.gyp:base',
         '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../../mojo/mojo_base.gyp:mojo_cpp_bindings',
         '../../mojo/mojo_base.gyp:mojo_environment_chromium',
         '../../mojo/mojo_base.gyp:mojo_system_impl',
       ],
       'sources': [
         'ipc_channel_mojo.cc',
         'ipc_channel_mojo.h',
+        'ipc_channel_mojo_readers.cc',
+        'ipc_channel_mojo_readers.h',
         'ipc_message_pipe_reader.cc',
         'ipc_message_pipe_reader.h',
       ],
       # TODO(gregoryd): direct_dependent_settings should be shared with the
       # 64-bit target, but it doesn't work due to a bug in gyp
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
       },
@@ skipping 43 matching lines @@
         '..'
       ],
       'sources': [
         'ipc_mojo_perftest.cc',
       ],
       'conditions': [
       ],
     },
   ],
 }