Move API functions registrations out of ExtensionFunctionRegistry.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
===================================================================
--- chrome/chrome_tests.gypi	(revision 181773)
+++ chrome/chrome_tests.gypi	(working copy)
@@ -1112,7 +1112,7 @@
         'browser/extensions/api/idltest/idltest_apitest.cc',
         'browser/extensions/api/input/input_apitest.cc',
         'browser/extensions/api/input_ime/input_ime_apitest_chromeos.cc',
-        'browser/extensions/api/managed_mode/managed_mode_apitest.cc',
+        'browser/extensions/api/managed_mode_private/managed_mode_apitest.cc',
         'browser/extensions/api/management/management_api_browsertest.cc',
         'browser/extensions/api/management/management_apitest.cc',
         'browser/extensions/api/management/management_browsertest.cc',
@@ -1120,7 +1120,7 @@
         'browser/extensions/api/media_galleries_private/media_galleries_private_apitest.cc',
         'browser/extensions/api/media_galleries_private/media_galleries_watch_apitest.cc',
         'browser/extensions/api/messaging/native_messaging_apitest_posix.cc',
-        'browser/extensions/api/metrics/metrics_apitest.cc',
+        'browser/extensions/api/metrics_private/metrics_apitest.cc',
         'browser/extensions/api/module/module_apitest.cc',
         'browser/extensions/api/notification/notification_apitest.cc',
         'browser/extensions/api/omnibox/omnibox_apitest.cc',
@@ -1212,7 +1212,7 @@
         'browser/extensions/api/storage/settings_apitest.cc',
         'browser/extensions/stubs_apitest.cc',
         'browser/extensions/subscribe_page_action_browsertest.cc',
-        'browser/extensions/system/system_apitest.cc',
+        'browser/extensions/api/system_private/system_private_apitest.cc',
         'browser/extensions/web_contents_browsertest.cc',
         'browser/extensions/web_view_browsertest.cc',
         'browser/extensions/webstore_standalone_install_browsertest.cc',