Make Encryptor a component. Used by //chrome and (soon) //components/webdata.

chrome/browser/password_manager/encryptor.h

-// Copyright (c) 2010 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_H__
-#define CHROME_BROWSER_PASSWORD_MANAGER_ENCRYPTOR_H__
-
-#include <string>
-
-#include "base/string16.h"
-
-// The Encryptor class gives access to simple encryption and decryption of
-// strings.  Note that on Mac, access to the system Keychain is required and
-// these calls can block the current thread to collect user input.
-class Encryptor {
- public:
-  // Encrypt a string16. The output (second argument) is
-  // really an array of bytes, but we're passing it back
-  // as a std::string
-  static bool EncryptString16(const string16& plaintext,
-                              std::string* ciphertext);
-
-  // Decrypt an array of bytes obtained with EncryptString16
-  // back into a string16. Note that the input (first argument)
-  // is a std::string, so you need to first get your (binary)
-  // data into a string.
-  static bool DecryptString16(const std::string& ciphertext,
-                              string16* plaintext);
-
-  // Encrypt a string.
-  static bool EncryptString(const std::string& plaintext,
-                            std::string* ciphertext);
-
-  // Decrypt an array of bytes obtained with EnctryptString
-  // back into a string. Note that the input (first argument)
-  // is a std::string, so you need to first get your (binary)
-  // data into a string.
-  static bool DecryptString(const std::string& ciphertext,
-                            std::string* plaintext);
-
-#if defined(OS_MACOSX)
-  // For unit testing purposes we instruct the Encryptor to use a mock Keychain
-  // on the Mac.  The default is to use the real Keychain.
-  static void UseMockKeychain(bool use_mock);
-#endif
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(Encryptor);
-};
-
-#endif  // CHROME_BROWSER_PASSWORD_MANAGER_ENCRYPTOR_H__