Introduce HostID and de-couple Extensions from "script injection System" [browser side]

extensions/extensions.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 68 matching lines @@
         'common/api/bluetooth/bluetooth_manifest_permission.h',
         'common/api/messaging/message.h',
         'common/api/sockets/sockets_manifest_data.cc',
         'common/api/sockets/sockets_manifest_data.h',
         'common/api/sockets/sockets_manifest_handler.cc',
         'common/api/sockets/sockets_manifest_handler.h',
         'common/api/sockets/sockets_manifest_permission.cc',
         'common/api/sockets/sockets_manifest_permission.h',
         'common/common_manifest_handlers.cc',
         'common/common_manifest_handlers.h',
+        'common/consumer.cc',
+        'common/consumer.h',
         'common/csp_validator.cc',
         'common/csp_validator.h',
         'common/dom_action_types.h',
         'common/draggable_region.cc',
         'common/draggable_region.h',
         'common/error_utils.cc',
         'common/error_utils.h',
         'common/event_filter.cc',
         'common/event_filter.h',
         'common/event_filtering_info.cc',
@@ skipping 1195 matching lines @@
       'conditions': [
         ['OS=="win" and win_use_allocator_shim==1', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },
   ]
 }