Refactor AO2TS to make it easier to componentize.

ios/public/test/test_keyed_service_provider.cc

Index: ios/public/test/test_keyed_service_provider.cc
diff --git a/ios/public/test/test_keyed_service_provider.cc b/ios/public/test/test_keyed_service_provider.cc
index db8e40c4d3bd2bb702f1d948a89b36e6e2b0c3d0..5089af4993d5811b06e3dbee0bdb46ca74536da8 100644
--- a/ios/public/test/test_keyed_service_provider.cc
+++ b/ios/public/test/test_keyed_service_provider.cc
@@ -83,12 +83,12 @@ TestKeyedServiceProvider::GetBookmarkModelForBrowserState(
 }
 
 KeyedServiceBaseFactory*
-TestKeyedServiceProvider::GetProfileOAuth2TokenServiceIOSFactory() {
+TestKeyedServiceProvider::GetProfileOAuth2TokenServiceFactory() {
   return MissingServiceKeyedServiceFactory::GetInstance();
 }
 
-ProfileOAuth2TokenServiceIOS*
-TestKeyedServiceProvider::GetProfileOAuth2TokenServiceIOSForBrowserState(
+ProfileOAuth2TokenService*
+TestKeyedServiceProvider::GetProfileOAuth2TokenServiceForBrowserState(
     ChromeBrowserState* browser_state) {
   return nullptr;
 }