Remove outdated devices from Android device chooser

device/bluetooth/bluetooth_adapter_android.cc

Index: device/bluetooth/bluetooth_adapter_android.cc
diff --git a/device/bluetooth/bluetooth_adapter_android.cc b/device/bluetooth/bluetooth_adapter_android.cc
index b3891a47ef983409435a2421d014e4bdd5230a57..db13d6cb0d700dee730c3ad02d3f62a912af17cd 100644
--- a/device/bluetooth/bluetooth_adapter_android.cc
+++ b/device/bluetooth/bluetooth_adapter_android.cc
@@ -168,6 +168,7 @@ void BluetoothAdapterAndroid::CreateOrUpdateDeviceOnScan(
     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));
@@ -175,6 +176,7 @@ void BluetoothAdapterAndroid::CreateOrUpdateDeviceOnScan(
     // 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));