cros: Replace "TPM" with "secure module" for machines without TPM.

chromeos/tpm/tpm_token_info_getter.h

 // Copyright 2014 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 CHROMEOS_TPM_TPM_TOKEN_INFO_GETTER_H_
 #define CHROMEOS_TPM_TPM_TOKEN_INFO_GETTER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 40 matching lines @@
   static std::unique_ptr<TPMTokenInfoGetter> CreateForUserToken(
       const AccountId& account_id,
       CryptohomeClient* cryptohome_client,
       const scoped_refptr<base::TaskRunner>& delayed_task_runner);
 
   // Factory method for TPMTokenGetter for the system token.
   static std::unique_ptr<TPMTokenInfoGetter> CreateForSystemToken(
       CryptohomeClient* cryptohome_client,
       const scoped_refptr<base::TaskRunner>& delayed_task_runner);
 
+  // Method to figure out if this machine has a TPM.
+  static bool DoesTPMExist();
+
   ~TPMTokenInfoGetter();
 
   // Starts getting TPM token info. Should be called at most once.
   // |callback| will be called when all the info is fetched.
   // The object may get deleted before |callback| is called, which is equivalent
   // to cancelling the info getting (in which case |callback| will never get
   // called).
   void Start(const TPMTokenInfoCallback& callback);
 
  private:
@@ skipping 51 matching lines @@
   CryptohomeClient* cryptohome_client_;
 
   base::WeakPtrFactory<TPMTokenInfoGetter> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TPMTokenInfoGetter);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_TPM_TPM_TOKEN_INFO_GETTER_H_