Make the SigninErrorController a PKS.

chrome/browser/signin/signin_global_error_factory.cc

Index: chrome/browser/signin/signin_global_error_factory.cc
diff --git a/chrome/browser/signin/signin_global_error_factory.cc b/chrome/browser/signin/signin_global_error_factory.cc
index 47ecb908b0d2f025c9c46bd152e4bfd398af624f..a1900a7dbef1c8e34bc8b0ec55a046665e30ed8d 100644
--- a/chrome/browser/signin/signin_global_error_factory.cc
+++ b/chrome/browser/signin/signin_global_error_factory.cc
@@ -6,7 +6,7 @@
 
 #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_global_error.h"
 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
@@ -20,7 +20,7 @@ SigninGlobalErrorFactory::SigninGlobalErrorFactory()
     : BrowserContextKeyedServiceFactory(
         "SigninGlobalError",
         BrowserContextDependencyManager::GetInstance()) {
-  DependsOn(ProfileOAuth2TokenServiceFactory::GetInstance());
+  DependsOn(SigninErrorControllerFactory::GetInstance());
   DependsOn(GlobalErrorServiceFactory::GetInstance());
 }
 
@@ -47,9 +47,6 @@ KeyedService* SigninGlobalErrorFactory::BuildServiceInstanceFor(
 
   Profile* profile = static_cast<Profile*>(context);
 
-  SigninErrorController* controller =
-      ProfileOAuth2TokenServiceFactory::GetForProfile(profile)->
-      signin_error_controller();
-
-  return new SigninGlobalError(controller, profile);
+  return new SigninGlobalError(
+      SigninErrorControllerFactory::GetForProfile(profile), profile);
 }