Allow signin to continue even if sync is disabled by policy.

chrome/browser/signin/fake_auth_status_provider.cc

+// Copyright (c) 2013 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/fake_auth_status_provider.h"
+
+FakeAuthStatusProvider::FakeAuthStatusProvider(SigninGlobalError* error)
+  : global_error_(error),
+    auth_error_(GoogleServiceAuthError::None()) {
+  global_error_->AddProvider(this);
+}
+
+FakeAuthStatusProvider::~FakeAuthStatusProvider() {
+  global_error_->RemoveProvider(this);
+}
+
+GoogleServiceAuthError FakeAuthStatusProvider::GetAuthStatus() const {
+  return auth_error_;
+}
+
+void FakeAuthStatusProvider::SetAuthError(const GoogleServiceAuthError& error) {
+  auth_error_ = error;
+  global_error_->AuthStatusChanged();
+}