Extract RuntimeEventRouter from extensions Runtime API

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 188 matching lines @@
         'browser/api/api_resource.h',
         'browser/api/api_resource_manager.h',
         'browser/api/async_api_function.cc',
         'browser/api/async_api_function.h',
         'browser/api/dns/dns_api.cc',
         'browser/api/dns/dns_api.h',
         'browser/api/dns/host_resolver_wrapper.cc',
         'browser/api/dns/host_resolver_wrapper.h',
         'browser/api/extensions_api_client.cc',
         'browser/api/extensions_api_client.h',
+        'browser/api/runtime/runtime_event_router.cc',
+        'browser/api/runtime/runtime_event_router.h',
         'browser/api/socket/socket.cc',
         'browser/api/socket/socket.h',
         'browser/api/socket/socket_api.cc',
         'browser/api/socket/socket_api.h',
         'browser/api/socket/tcp_socket.cc',
         'browser/api/socket/tcp_socket.h',
         'browser/api/socket/udp_socket.cc',
         'browser/api/socket/udp_socket.h',
         'browser/api/sockets_tcp/sockets_tcp_api.cc',
         'browser/api/sockets_tcp/sockets_tcp_api.h',
@@ skipping 159 matching lines @@
         'common/test_util.cc',
         'common/test_util.h',
         'common/value_builder.cc',
         'common/value_builder.h',
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ]
 }