Move *keychain_mac* files to crypto/

chrome/browser/password_manager/encryptor_password_mac.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 CHROME_BROWSER_PASSWORD_MANAGER_ENCRYPTOR_PASSWORD_H__
 #define CHROME_BROWSER_PASSWORD_MANAGER_ENCRYPTOR_PASSWORD_H__
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 
+namespace crypto {
 class MacKeychain;
+}  // namespace crypto
 
 class EncryptorPassword {
  public:
-  explicit EncryptorPassword(const MacKeychain& keychain)
+  explicit EncryptorPassword(const crypto::MacKeychain& keychain)
       : keychain_(keychain) {
   }
 
   // Get the Encryptor password for this system.  If no password exists
   // in the Keychain then one is generated, stored in the Mac keychain, and
   // returned.
   // If one exists then it is fetched from the Keychain and returned.
   // If the user disallows access to the Keychain (or an error occurs) then an
   // empty string is returned.
   std::string GetEncryptorPassword() const;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(EncryptorPassword);
-  const MacKeychain& keychain_;
+  const crypto::MacKeychain& keychain_;
 };
 
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_ENCRYPTOR_PASSWORD_H__