settings: Add async system salt retrieval logic in DeviceOAuth2TokenServiceFactory

chromeos/dbus/fake_cryptohome_client.cc

 // Copyright 2013 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.
 
 #include "chromeos/dbus/fake_cryptohome_client.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop.h"
 #include "crypto/nss_util.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace chromeos {
 
 FakeCryptohomeClient::FakeCryptohomeClient()
     : service_is_available_(true),
       async_call_id_(1),
       tpm_is_ready_counter_(0),
       unmount_result_(true),
+      system_salt_(GetStubSystemSalt()),
       locked_(false),
       weak_ptr_factory_(this) {}
 
 FakeCryptohomeClient::~FakeCryptohomeClient() {}
 
 void FakeCryptohomeClient::Init(dbus::Bus* bus) {
 }
 
 void FakeCryptohomeClient::SetAsyncCallStatusHandlers(
     const AsyncCallStatusHandler& handler,
@@ skipping 43 matching lines @@
   ReturnAsyncMethodResult(callback, false);
 }
 
 void FakeCryptohomeClient::AsyncRemove(
     const std::string& username,
     const AsyncMethodCallback& callback) {
   ReturnAsyncMethodResult(callback, false);
 }
 
 bool FakeCryptohomeClient::GetSystemSalt(std::vector<uint8>* salt) {
-  *salt = GetStubSystemSalt();
+  *salt = system_salt_;
   return true;
 }
 
 void FakeCryptohomeClient::GetSanitizedUsername(
     const std::string& username,
     const StringDBusMethodCallback& callback) {
   // Even for stub implementation we have to return different values so that
   // multi-profiles would work.
   std::string sanitized_username = GetStubSanitizedUsername(username);
   base::MessageLoop::current()->PostTask(
@@ skipping 329 matching lines @@
         FROM_HERE,
         base::Bind(async_call_status_data_handler_,
                    async_call_id_,
                    true,
                    std::string()));
   }
   ++async_call_id_;
 }
 
 }  // namespace chromeos