Improve unit testing of socket API.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 815875723d4d61b6c09d85bbb8639b3ab7eb37a5..684adc20b4a0058992aaf0327001f6ea6d3b9100 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1206,18 +1206,19 @@
         'browser/extensions/api/cookies/cookies_unittest.cc',
         'browser/extensions/api/declarative/initializing_rules_registry_unittest.cc',
         'browser/extensions/api/declarative/rules_registry_service_unittest.cc',
-        'browser/extensions/api/discovery/discovery_api_unittest.cc',
         'browser/extensions/api/declarative/rules_registry_with_cache_unittest.cc',
         'browser/extensions/api/declarative_webrequest/webrequest_action_unittest.cc',
         'browser/extensions/api/declarative_webrequest/webrequest_condition_attribute_unittest.cc',
         'browser/extensions/api/declarative_webrequest/webrequest_condition_unittest.cc',
         'browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc',
+        'browser/extensions/api/discovery/discovery_api_unittest.cc',
         'browser/extensions/api/extension_action/extension_browser_actions_api_unittest.cc',
         'browser/extensions/api/identity/web_auth_flow_unittest.cc',
         'browser/extensions/api/omnibox/omnibox_unittest.cc',
         'browser/extensions/api/permissions/permissions_api_helpers_unittest.cc',
         'browser/extensions/api/proxy/proxy_api_helpers_unittest.cc',
         'browser/extensions/api/serial/serial_port_enumerator_unittest.cc',
+        'browser/extensions/api/socket/socket_api_unittest.cc',
         'browser/extensions/api/socket/tcp_socket_unittest.cc',
         'browser/extensions/api/web_navigation/frame_navigation_state_unittest.cc',
         'browser/extensions/api/web_request/web_request_api_unittest.cc',