Use stub impl when libcros fails to load

chrome/browser/chromeos/cros/mock_cryptohome_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_CRYPTOHOME_LIBRARY_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_MOCK_CRYPTOHOME_LIBRARY_H_
 #pragma once
 
 #include <string>
 
 #include "chrome/browser/chromeos/cros/cryptohome_library.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 using ::testing::Invoke;
 using ::testing::WithArgs;
 using ::testing::_;
 
 namespace chromeos {
 
 class MockCryptohomeLibrary : public CryptohomeLibrary {
  public:
   MockCryptohomeLibrary();
   virtual ~MockCryptohomeLibrary();
 
   void SetUp(bool outcome, int code);
 
+  MOCK_METHOD0(Init, void(void));
   MOCK_METHOD2(CheckKey, bool(const std::string& user_email,
                               const std::string& passhash));
   MOCK_METHOD3(AsyncCheckKey, bool(const std::string& user_email,
                                    const std::string& passhash,
                                    Delegate* callback));
   MOCK_METHOD3(MigrateKey, bool(const std::string& user_email,
                                 const std::string& old_hash,
                                 const std::string& new_hash));
   MOCK_METHOD4(AsyncMigrateKey, bool(const std::string& user_email,
                                      const std::string& old_hash,
@@ skipping 48 matching lines @@
 
  private:
   bool outcome_;
   int code_;
   DISALLOW_COPY_AND_ASSIGN(MockCryptohomeLibrary);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_MOCK_CRYPTOHOME_LIBRARY_H_