Make the SigninErrorController a PKS.

chrome/browser/signin/signin_error_controller_factory.cc

Index: chrome/browser/signin/signin_error_controller_factory.cc
diff --git a/chrome/browser/signin/signin_error_controller_factory.cc b/chrome/browser/signin/signin_error_controller_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..796836d1066074b49e0533a1b7cf2c24796f179f
--- /dev/null
+++ b/chrome/browser/signin/signin_error_controller_factory.cc
@@ -0,0 +1,32 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/signin/signin_error_controller_factory.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+
+SigninErrorControllerFactory::SigninErrorControllerFactory()
+    : BrowserContextKeyedServiceFactory(
+          "SigninErrorController",
+          BrowserContextDependencyManager::GetInstance()) {}
+
+SigninErrorControllerFactory::~SigninErrorControllerFactory() {}
+
+// static
+SigninErrorController* SigninErrorControllerFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<SigninErrorController*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true));
+}
+
+// static
+SigninErrorControllerFactory* SigninErrorControllerFactory::GetInstance() {
+  return Singleton<SigninErrorControllerFactory>::get();
+}
+
+KeyedService* SigninErrorControllerFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  return new SigninErrorController();
+}