Revert of Delete dead signin code (SigninGlobalError)

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
new file mode 100644
index 0000000000000000000000000000000000000000..a1900a7dbef1c8e34bc8b0ec55a046665e30ed8d
--- /dev/null
+++ b/chrome/browser/signin/signin_global_error_factory.cc
@@ -0,0 +1,52 @@
+// Copyright 2014 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_global_error_factory.h"
+
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/profiles/profile.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"
+#include "components/signin/core/browser/profile_oauth2_token_service.h"
+
+#if defined(USE_ASH)
+#include "ash/shell.h"
+#endif
+
+SigninGlobalErrorFactory::SigninGlobalErrorFactory()
+    : BrowserContextKeyedServiceFactory(
+        "SigninGlobalError",
+        BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(SigninErrorControllerFactory::GetInstance());
+  DependsOn(GlobalErrorServiceFactory::GetInstance());
+}
+
+SigninGlobalErrorFactory::~SigninGlobalErrorFactory() {}
+
+// static
+SigninGlobalError* SigninGlobalErrorFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<SigninGlobalError*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true));
+}
+
+// static
+SigninGlobalErrorFactory* SigninGlobalErrorFactory::GetInstance() {
+  return Singleton<SigninGlobalErrorFactory>::get();
+}
+
+KeyedService* SigninGlobalErrorFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+#if defined(USE_ASH)
+  if (ash::Shell::HasInstance())
+    return NULL;
+#endif
+
+  Profile* profile = static_cast<Profile*>(context);
+
+  return new SigninGlobalError(
+      SigninErrorControllerFactory::GetForProfile(profile), profile);
+}