ServiceWorker: Introduce SWMessageSender in order to mock IPC messaging

content/content_child.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../mojo/mojo_base.gyp:mojo_environment_chromium',
     '../mojo/mojo_base.gyp:mojo_common_lib',
@@ skipping 178 matching lines @@
       'child/runtime_features.cc',
       'child/runtime_features.h',
       'child/scoped_child_process_reference.cc',
       'child/scoped_child_process_reference.h',
       'child/service_worker/service_worker_dispatcher.cc',
       'child/service_worker/service_worker_dispatcher.h',
       'child/service_worker/service_worker_handle_reference.cc',
       'child/service_worker/service_worker_handle_reference.h',
       'child/service_worker/service_worker_message_filter.cc',
       'child/service_worker/service_worker_message_filter.h',
+      'child/service_worker/service_worker_message_sender.cc',
+      'child/service_worker/service_worker_message_sender.h',
       'child/service_worker/service_worker_network_provider.cc',
       'child/service_worker/service_worker_network_provider.h',
       'child/service_worker/service_worker_provider_context.cc',
       'child/service_worker/service_worker_provider_context.h',
       'child/service_worker/service_worker_registration_handle_reference.cc',
       'child/service_worker/service_worker_registration_handle_reference.h',
       'child/service_worker/web_service_worker_impl.cc',
       'child/service_worker/web_service_worker_impl.h',
       'child/service_worker/web_service_worker_provider_impl.cc',
       'child/service_worker/web_service_worker_provider_impl.h',
@@ skipping 189 matching lines @@
         }, {
           'dependencies': [
             '../third_party/nss/nss.gyp:nspr',
             '../third_party/nss/nss.gyp:nss',
           ],
         }],
       ],
     }],
   ],
 }