Add IPC stubs between browser and ServiceWorker's worker context in the child process

content/content_common.gypi

 # Copyright (c) 2012 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',
     '../net/net.gyp:net',
     '../skia/skia.gyp:skia',
@@ skipping 296 matching lines @@
     'common/media/media_stream_options.h',
     'common/media/midi_messages.h',
     'common/media/video_capture.h',
     'common/media/video_capture_messages.h',
     'common/media/webrtc_identity_messages.h',
     'common/memory_benchmark_messages.h',
     'common/message_port_messages.h',
     'common/message_router.cc',
     'common/message_router.h',
     'common/mime_registry_messages.h',
-    'common/service_worker_messages.h',
     'common/navigation_gesture.h',
     'common/net/url_fetcher.cc',
     'common/net/url_request_user_data.cc',
     'common/net/url_request_user_data.h',
     'common/one_writer_seqlock.cc',
     'common/one_writer_seqlock.h',
     'common/p2p_messages.h',
     'common/page_state_serialization.cc',
     'common/page_state_serialization.h',
     'common/page_zoom.cc',
@@ skipping 36 matching lines @@
     'common/sandbox_linux/sandbox_seccomp_bpf_linux.cc',
     'common/sandbox_linux/sandbox_seccomp_bpf_linux.h',
     'common/sandbox_mac.h',
     'common/sandbox_mac.mm',
     'common/sandbox_util.cc',
     'common/sandbox_util.h',
     'common/sandbox_win.cc',
     'common/sandbox_win.h',
     'common/savable_url_schemes.cc',
     'common/savable_url_schemes.h',
+    'common/service_worker_interfaces.cc',
+    'common/service_worker_interfaces.h',
+    'common/service_worker_messages.h',
     'common/set_process_title.cc',
     'common/set_process_title.h',
     'common/set_process_title_linux.cc',
     'common/set_process_title_linux.h',
     'common/socket_stream.h',
     'common/socket_stream_handle_data.cc',
     'common/socket_stream_handle_data.h',
     'common/socket_stream_messages.h',
     'common/speech_recognition_messages.h',
     'common/ssl_status_serialization.cc',
@@ skipping 246 matching lines @@
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
         'msvs_cygwin_shell': 1,
       },
      ]
     }],
   ],
 }