Fix a crash in MimeHandlerServiceImpl::AbortStream().

extensions/BUILD.gn

 # Copyright 2014 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.
 
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
 assert(enable_extensions)
 
@@ skipping 168 matching lines @@
       "browser/api/cast_channel/cast_framer_unittest.cc",
       "browser/api/cast_channel/cast_socket_unittest.cc",
       "browser/api/cast_channel/cast_transport_unittest.cc",
       "browser/api/cast_channel/keep_alive_delegate_unittest.cc",
       "browser/api/cast_channel/logger_unittest.cc",
       "browser/api/declarative/declarative_rule_unittest.cc",
       "browser/api/declarative/deduping_factory_unittest.cc",
       "browser/api/declarative_webrequest/webrequest_condition_attribute_unittest.cc",
       "browser/api/declarative_webrequest/webrequest_condition_unittest.cc",
       "browser/api/idle/idle_api_unittest.cc",
+      "browser/api/mime_handler_private/mime_handler_private_unittest.cc",
       "browser/api/sockets_tcp/sockets_tcp_api_unittest.cc",
       "browser/api/sockets_udp/sockets_udp_api_unittest.cc",
       "browser/api/storage/settings_quota_unittest.cc",
       "browser/api/storage/storage_api_unittest.cc",
       "browser/api/storage/storage_frontend_unittest.cc",
       "browser/api/web_request/form_data_parser_unittest.cc",
       "browser/api/web_request/upload_data_presenter_unittest.cc",
       "browser/api/web_request/web_request_time_tracker_unittest.cc",
       "browser/computed_hashes_unittest.cc",
       "browser/content_hash_tree_unittest.cc",
@@ skipping 146 matching lines @@
   ]
 
   if (is_win) {
     deps += [ "//base/allocator" ]
   }
 
   if (is_mac) {
     deps += [ "shell:app_shell" ]  # Needed for App Shell.app's Helper.
   }
 }