Mojo: Start writing some unit tests for mojo::system::Channel.

mojo/mojo.gyp

 # 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.
 
 {
   'target_defaults': {
     'conditions': [
       ['mojo_shell_debug_url != ""', {
         'defines': [
           'MOJO_SHELL_DEBUG=1',
@@ skipping 185 matching lines @@
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:run_all_unittests',
         '../testing/gtest.gyp:gtest',
         'mojo_common_test_support',
         'mojo_system_impl',
       ],
       'sources': [
         'embedder/embedder_unittest.cc',
         'embedder/platform_channel_pair_posix_unittest.cc',
+        'system/channel_unittest.cc',
         'system/core_unittest.cc',
         'system/core_test_base.cc',
         'system/core_test_base.h',
         'system/data_pipe_unittest.cc',
         'system/dispatcher_unittest.cc',
         'system/local_data_pipe_unittest.cc',
         'system/message_pipe_dispatcher_unittest.cc',
         'system/message_pipe_unittest.cc',
         'system/multiprocess_message_pipe_unittest.cc',
         'system/raw_channel_unittest.cc',
@@ skipping 508 matching lines @@
             'mojo_js_unittests.isolate',
           ],
           'sources': [
             'mojo_js_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }