Tether: Break helper TimerFactory out of BleConnectionManager and HostScanCache.

chromeos/components/tether/host_scan_cache.cc

 // Copyright 2017 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/components/tether/host_scan_cache.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "chromeos/components/tether/active_host.h"
 #include "chromeos/components/tether/device_id_tether_network_guid_map.h"
 #include "chromeos/components/tether/tether_host_response_recorder.h"
+#include "chromeos/components/tether/timer_factory.h"
 #include "chromeos/network/network_state_handler.h"
 #include "components/proximity_auth/logging/logging.h"
 
 namespace chromeos {
 
 namespace tether {
 
-namespace {
-
-class TimerFactoryImpl : public HostScanCache::TimerFactory {
- public:
-  TimerFactoryImpl() {}
-  ~TimerFactoryImpl() {}
-
-  // HostScanCache::TimerFactory:
-  std::unique_ptr<base::Timer> CreateOneShotTimer() override {
-    return base::MakeUnique<base::OneShotTimer>();
-  }
-};
-
-}  // namespace
-
 HostScanCache::HostScanCache(
     NetworkStateHandler* network_state_handler,
     ActiveHost* active_host,
     TetherHostResponseRecorder* tether_host_response_recorder,
     DeviceIdTetherNetworkGuidMap* device_id_tether_network_guid_map)
-    : timer_factory_(base::MakeUnique<TimerFactoryImpl>()),
+    : timer_factory_(base::MakeUnique<TimerFactory>()),
       network_state_handler_(network_state_handler),
       active_host_(active_host),
       tether_host_response_recorder_(tether_host_response_recorder),
       device_id_tether_network_guid_map_(device_id_tether_network_guid_map),
       weak_ptr_factory_(this) {
   tether_host_response_recorder_->AddObserver(this);
 }
 
 HostScanCache::~HostScanCache() {
   tether_host_response_recorder_->RemoveObserver(this);
@@ skipping 166 matching lines @@
   }
 
   PA_LOG(INFO) << "Timer fired for Tether network GUID " << tether_network_guid
                << ". Removing stale scan result.";
   RemoveHostScanResult(tether_network_guid);
 }
 
 }  // namespace tether
 
 }  // namespace chromeos