Implement support for fallback update check urls in the component updater

components/components_tests.gyp

Index: components/components_tests.gyp
diff --git a/components/components_tests.gyp b/components/components_tests.gyp
index caf822dc9fb05769a4a42da7257cda67986f04d2..10a59b85d7f6535c0a56f19e8bdee221a2c6cee6 100644
--- a/components/components_tests.gyp
+++ b/components/components_tests.gyp
@@ -79,6 +79,7 @@
             'component_updater/test/component_patcher_unittest.cc',
             'component_updater/test/component_updater_ping_manager_unittest.cc',
             'component_updater/test/crx_downloader_unittest.cc',
+            'component_updater/test/request_sender_unittest.cc',
             'component_updater/test/update_checker_unittest.cc',
             'component_updater/test/update_response_unittest.cc',
             'content_settings/core/common/content_settings_pattern_parser_unittest.cc',
@@ -294,7 +295,7 @@
 
             # Dependencies of cloud_devices
             'components.gyp:cloud_devices_common',
-            
+
             # Dependencies of component_updater
             'components.gyp:component_updater',
             'components.gyp:component_updater_test_support',