[cros login] Split login related classes into subfolders.

chrome/browser/chromeos/login/tpm_password_fetcher.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_CHROMEOS_LOGIN_TPM_PASSWORD_FETCHER_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_TPM_PASSWORD_FETCHER_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/memory/weak_ptr.h"
-#include "chromeos/dbus/dbus_method_call_status.h"
-
-namespace chromeos {
-
-// Interface which TpmPasswordFetcher uses to notify that password has been
-// fetched.
-class TpmPasswordFetcherDelegate {
- public:
-  virtual ~TpmPasswordFetcherDelegate() {}
-  virtual void OnPasswordFetched(const std::string& tpm_password) = 0;
-};
-
-// Class for fetching TPM password from the Cryptohome.
-class TpmPasswordFetcher {
- public:
-  // Creates fetcher with the given delegate to be notified every time fetching
-  // is done.
-  explicit TpmPasswordFetcher(TpmPasswordFetcherDelegate* delegate);
-  ~TpmPasswordFetcher();
-
-  // Fetches TPM password and stores the result. Also notifies |delegate_| with
-  // OnPasswordFetched() call.
-  void Fetch();
-
- private:
-  // Used to implement Fetch().
-  void OnTpmIsReady(DBusMethodCallStatus call_status, bool tpm_is_ready);
-
-  // Used to implement Fetch().
-  void OnTpmGetPassword(DBusMethodCallStatus call_status,
-                        const std::string& password);
-
-  // Posts a task to call Fetch() later.
-  void RescheduleFetch();
-
-  base::WeakPtrFactory<TpmPasswordFetcher> weak_factory_;
-  TpmPasswordFetcherDelegate* delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(TpmPasswordFetcher);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_TPM_PASSWORD_FETCHER_H_