Make the SigninErrorController a PKS.

chrome/browser/signin/signin_error_notifier_factory_ash.cc

Index: chrome/browser/signin/signin_error_notifier_factory_ash.cc
diff --git a/chrome/browser/signin/signin_error_notifier_factory_ash.cc b/chrome/browser/signin/signin_error_notifier_factory_ash.cc
index 100df639dc533099c634532f93e6fc72117cce6d..75c975f4306e2e3a2997e12ef69c9679226df1ca 100644
--- a/chrome/browser/signin/signin_error_notifier_factory_ash.cc
+++ b/chrome/browser/signin/signin_error_notifier_factory_ash.cc
@@ -7,7 +7,7 @@
 #include "ash/shell.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
+#include "chrome/browser/signin/signin_error_controller_factory.h"
 #include "chrome/browser/signin/signin_error_notifier_ash.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
@@ -16,7 +16,7 @@ SigninErrorNotifierFactory::SigninErrorNotifierFactory()
     : BrowserContextKeyedServiceFactory(
         "SigninErrorNotifier",
         BrowserContextDependencyManager::GetInstance()) {
-  DependsOn(ProfileOAuth2TokenServiceFactory::GetInstance());
+  DependsOn(SigninErrorControllerFactory::GetInstance());
 }
 
 SigninErrorNotifierFactory::~SigninErrorNotifierFactory() {}
@@ -40,9 +40,6 @@ KeyedService* SigninErrorNotifierFactory::BuildServiceInstanceFor(
 
   Profile* profile = static_cast<Profile*>(context);
 
-  SigninErrorController* controller =
-      ProfileOAuth2TokenServiceFactory::GetForProfile(profile)->
-      signin_error_controller();
-
-  return new SigninErrorNotifier(controller, profile);
+  return new SigninErrorNotifier(
+      SigninErrorControllerFactory::GetForProfile(profile), profile);
 }