Remove outdated devices from Android device chooser

device/bluetooth/bluetooth_adapter_android.cc

 // Copyright 2015 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 "device/bluetooth/bluetooth_adapter_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/sequenced_task_runner.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 150 matching lines @@
     const JavaParamRef<jobject>&
         advertised_uuids) {  // Java Type: List<ParcelUuid>
   std::string device_address = ConvertJavaStringToUTF8(env, address);
   DevicesMap::const_iterator iter = devices_.find(device_address);
 
   if (iter == devices_.end()) {
     // New device.
     BluetoothDeviceAndroid* device_android =
         BluetoothDeviceAndroid::Create(this, bluetooth_device_wrapper);
     device_android->UpdateAdvertisedUUIDs(advertised_uuids);
+    device_android->UpdateTimestamp();
     devices_.add(device_address, scoped_ptr<BluetoothDevice>(device_android));
     FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
                       DeviceAdded(this, device_android));
   } else {
     // Existing device.
     BluetoothDeviceAndroid* device_android =
         static_cast<BluetoothDeviceAndroid*>(iter->second);
+    device_android->UpdateTimestamp();
     if (device_android->UpdateAdvertisedUUIDs(advertised_uuids)) {
       FOR_EACH_OBSERVER(BluetoothAdapter::Observer, observers_,
                         DeviceChanged(this, device_android));
     }
   }
 }
 
 BluetoothAdapterAndroid::BluetoothAdapterAndroid() : weak_ptr_factory_(this) {
 }
 
@@ skipping 36 matching lines @@
   // TODO(scheib): Support filters crbug.com/490401
   NOTIMPLEMENTED();
   error_callback.Run(UMABluetoothDiscoverySessionOutcome::NOT_IMPLEMENTED);
 }
 
 void BluetoothAdapterAndroid::RemovePairingDelegateInternal(
     device::BluetoothDevice::PairingDelegate* pairing_delegate) {
 }
 
 }  // namespace device