chromeos: Remove SystemSaltGetter::GetSystemSaltSync

chromeos/dbus/cryptohome_client.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 CHROMEOS_DBUS_CRYPTOHOME_CLIENT_H_
 #define CHROMEOS_DBUS_CRYPTOHOME_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 17 matching lines @@
                               bool return_status,
                               int return_code)>
       AsyncCallStatusHandler;
   // A callback to handle AsyncCallStatusWithData signals.
   typedef base::Callback<void(int async_id,
                               bool return_status,
                               const std::string& data)>
       AsyncCallStatusWithDataHandler;
   // A callback to handle responses of AsyncXXX methods.
   typedef base::Callback<void(int async_id)> AsyncMethodCallback;
+  // A callback for GetSystemSalt().
+  typedef base::Callback<void(
+      DBusMethodCallStatus call_status,
+      const std::vector<uint8>& system_salt)> GetSystemSaltCallback;
   // A callback for WaitForServiceToBeAvailable().
   typedef base::Callback<void(bool service_is_ready)>
       WaitForServiceToBeAvailableCallback;
   // A callback to handle responses of Pkcs11GetTpmTokenInfo method.  The result
   // of the D-Bus call is in |call_status|.  On success, |label| holds the
   // PKCS #11 token label.  This is not useful in practice to identify a token
   // but may be meaningful to a user.  The |user_pin| can be used with the
   // C_Login PKCS #11 function but is not necessary because tokens are logged in
   // for the duration of a signed-in session.  The |slot| corresponds to a
   // CK_SLOT_ID for the PKCS #11 API and reliably identifies the token for the
@@ skipping 50 matching lines @@
   virtual void AsyncMigrateKey(const std::string& username,
                                const std::string& from_key,
                                const std::string& to_key,
                                const AsyncMethodCallback& callback) = 0;
 
   // Calls AsyncRemove method.  |callback| is called after the method call
   // succeeds.
   virtual void AsyncRemove(const std::string& username,
                            const AsyncMethodCallback& callback) = 0;
 
-  // Calls GetSystemSalt method.  This method blocks until the call returns.
-  // The original content of |salt| is lost.
-  virtual bool GetSystemSalt(std::vector<uint8>* salt) = 0;
+  // Calls GetSystemSalt method.  |callback| is called after the method call
+  // succeeds.
+  virtual void GetSystemSalt(const GetSystemSaltCallback& callback) = 0;
 
   // Calls GetSanitizedUsername method.  |callback| is called after the method
   // call succeeds.
   virtual void GetSanitizedUsername(
       const std::string& username,
       const StringDBusMethodCallback& callback) = 0;
 
   // Same as GetSanitizedUsername() but blocks until a reply is received, and
   // returns the sanitized username synchronously. Returns an empty string if
   // the method call fails.
@@ skipping 292 matching lines @@
   // Create() should be used instead.
   CryptohomeClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CryptohomeClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_CRYPTOHOME_CLIENT_H_