Componentize SigninErrorController unittest.

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(SigninErrorController* error)
-  : error_provider_(error),
-    auth_error_(GoogleServiceAuthError::AuthErrorNone()) {
-  error_provider_->AddProvider(this);
-}
-
-FakeAuthStatusProvider::~FakeAuthStatusProvider() {
-  error_provider_->RemoveProvider(this);
-}
-
-std::string FakeAuthStatusProvider::GetAccountId() const {
-  return account_id_;
-}
-
-GoogleServiceAuthError FakeAuthStatusProvider::GetAuthStatus() const {
-  return auth_error_;
-}
-
-void FakeAuthStatusProvider::SetAuthError(const std::string& account_id,
-                                          const GoogleServiceAuthError& error) {
-  account_id_ = account_id;
-  auth_error_ = error;
-  error_provider_->AuthStatusChanged();
-}