Implement Mac Keychain migration algorithm.

crypto/mock_apple_keychain.h

 // Copyright (c) 2012 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 CRYPTO_MOCK_KEYCHAIN_MAC_H_
 #define CRYPTO_MOCK_KEYCHAIN_MAC_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 100 matching lines @@
     const char* path;
     const UInt32 port;
     const char* security_domain;
     const char* creation_date;
     const char* username;
     const char* password;
     const bool negative_item;
   };
   // Adds a keychain item with the given info to the test set.
   void AddTestItem(const KeychainTestData& item_data);
+
+  void set_locked(bool locked) { locked_ = locked; }
 #endif  // !defined(OS_IOS)
 
   // |FindGenericPassword()| can return different results depending on user
   // interaction with the system Keychain.  For mocking purposes we allow the
   // user of this class to specify the result code of the
   // |FindGenericPassword()| call so we can simulate the result of different
   // user interactions.
   void set_find_generic_result(OSStatus result) {
     find_generic_result_ = result;
   }
@@ skipping 63 matching lines @@
   // the data will not be null-terminated.
   void SetTestDataPasswordString(MockKeychainItemType item, const char* value);
 
   // Returns the address of the attribute in attribute_list with tag |tag|.
   static SecKeychainAttribute* AttributeWithTag(
       const SecKeychainAttributeList& attribute_list,
       UInt32 tag);
 
   static const SecKeychainSearchRef kDummySearchRef;
 
+  // Simulates the state when the user refuses to unclock the Keychain.
+  // If true, reading and modifying a password value result in errSecAuthFailed.
+  bool locked_;
+
   typedef struct KeychainPasswordData {
     KeychainPasswordData() : data(NULL), length(0) {}
     void* data;
     UInt32 length;
   } KeychainPasswordData;
 
   // Mutable because the MockAppleKeychain API requires its internal keychain
   // storage to be modifiable by users of this class.
   mutable MockKeychainAttributesMap keychain_attr_list_;
   mutable std::map<MockKeychainItemType,
@@ skipping 27 matching lines @@
   // and |ItemFreeContent|.
   mutable int password_data_count_;
 
   // Records the password being set when |AddGenericPassword()| gets called.
   mutable std::string add_generic_password_;
 };
 
 }  // namespace crypto
 
 #endif  // CRYPTO_MOCK_KEYCHAIN_MAC_H_