Use stub impl when libcros fails to load

chrome/browser/chromeos/cros/mock_login_library.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_CROS_MOCK_LOGIN_LIBRARY_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_MOCK_LOGIN_LIBRARY_H_
 #pragma once
 
 #include <string>
 
 #include "chrome/browser/chromeos/cros/login_library.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace chromeos {
 
 class MockLoginLibrary : public LoginLibrary {
  public:
   MockLoginLibrary();
   virtual ~MockLoginLibrary();
 
+  MOCK_METHOD0(Init, void(void));
   MOCK_METHOD0(EmitLoginPromptReady, void(void));
   MOCK_METHOD2(RequestRetrievePolicy, void(RetrievePolicyCallback, void*));
   MOCK_METHOD3(RequestStorePolicy, void(const std::string&,
                                         StorePolicyCallback,
                                         void*));
   MOCK_METHOD2(StartSession, bool(const std::string&, const std::string&));
   MOCK_METHOD1(StopSession, bool(const std::string&));
   MOCK_METHOD0(RestartEntd, bool(void));
   MOCK_METHOD2(RestartJob, bool(int, const std::string&));
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_MOCK_LOGIN_LIBRARY_H_