Remove outdated devices from Android device chooser

device/bluetooth/bluetooth_device.cc

Index: device/bluetooth/bluetooth_device.cc
diff --git a/device/bluetooth/bluetooth_device.cc b/device/bluetooth/bluetooth_device.cc
index af89b42b3ebafdba333c18b1b748bd2ab3e6ccec..a6ff936d3acb7e320b18c6cfa5a276a72ef0d99a 100644
--- a/device/bluetooth/bluetooth_device.cc
+++ b/device/bluetooth/bluetooth_device.cc
@@ -11,6 +11,7 @@
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
 #include "base/values.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_gatt_connection.h"
@@ -23,7 +24,8 @@ namespace device {
 BluetoothDevice::BluetoothDevice(BluetoothAdapter* adapter)
     : adapter_(adapter),
       gatt_services_discovery_complete_(false),
-      services_data_(new base::DictionaryValue()) {}
+      services_data_(new base::DictionaryValue()),
+      last_update_time_(base::Time()) {}
 
 BluetoothDevice::~BluetoothDevice() {
   for (BluetoothGattConnection* connection : gatt_connections_) {
@@ -391,4 +393,8 @@ void BluetoothDevice::Pair(PairingDelegate* pairing_delegate,
   NOTREACHED();
 }
 
+void BluetoothDevice::UpdateTimestamp() {
+  last_update_time_ = base::Time::NowFromSystemTime();
+}
+
 }  // namespace device