Remove outdated devices from Android device chooser

device/bluetooth/bluetooth_device.h

 // Copyright (c) 2012 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/string16.h"
+#include "base/time/time.h"
 #include "device/bluetooth/bluetooth_export.h"
 #include "device/bluetooth/bluetooth_uuid.h"
 #include "net/log/net_log.h"
 
 namespace base {
 class BinaryValue;
 }
 
 namespace device {
 
@@ skipping 430 matching lines @@
   virtual base::BinaryValue* GetServiceData(BluetoothUUID serviceUUID) const;
 
   // Returns the list UUIDs of services that have service data.
   virtual UUIDList GetServiceDataUUIDs() const;
 
   // Returns the |address| in the canonical format: XX:XX:XX:XX:XX:XX, where
   // each 'X' is a hex digit.  If the input |address| is invalid, returns an
   // empty string.
   static std::string CanonicalizeAddress(const std::string& address);
 
+  // Return the timestamp for when this device was last seen.
+  base::Time GetLastUpdateTime() const { return last_update_time_; }
+
+  // Update the last time this device was seen.
+  void UpdateTimestamp();
+
   // Return associated BluetoothAdapter.
   BluetoothAdapter* GetAdapter() { return adapter_; }
 
  protected:
   // BluetoothGattConnection is a friend to call Add/RemoveGattConnection.
   friend BluetoothGattConnection;
   FRIEND_TEST_ALL_PREFIXES(
       BluetoothTest,
       BluetoothGattConnection_DisconnectGatt_SimulateConnect);
   FRIEND_TEST_ALL_PREFIXES(
       BluetoothTest,
       BluetoothGattConnection_DisconnectGatt_SimulateDisconnect);
   FRIEND_TEST_ALL_PREFIXES(BluetoothTest,
                            BluetoothGattConnection_ErrorAfterConnection);
   FRIEND_TEST_ALL_PREFIXES(BluetoothTest,
                            BluetoothGattConnection_DisconnectGatt_Cleanup);
   FRIEND_TEST_ALL_PREFIXES(BluetoothTest, GetDeviceName_NullName);
+  FRIEND_TEST_ALL_PREFIXES(BluetoothTest, RemoveOutdatedDevices);
 
   BluetoothDevice(BluetoothAdapter* adapter);
 
   // Returns the internal name of the Bluetooth device, used by
   // GetNameForDisplay().
   virtual std::string GetDeviceName() const = 0;
 
   // Implements platform specific operations to initiate a GATT connection.
   // Subclasses must also call DidConnectGatt, DidFailToConnectGatt, or
   // DidDisconnectGatt immediately or asynchronously as the connection state
@@ skipping 46 matching lines @@
                                  std::unique_ptr<BluetoothRemoteGattService>>
       GattServiceMap;
   GattServiceMap gatt_services_;
   bool gatt_services_discovery_complete_;
 
   // Mapping from service UUID represented as a std::string of a bluetooth
   // service to
   // the specific data. The data is stored as BinaryValue.
   std::unique_ptr<base::DictionaryValue> services_data_;
 
+  // Timestamp for when an advertisement was last seen.
+  base::Time last_update_time_;
+
  private:
   // Returns a localized string containing the device's bluetooth address and
   // a device type for display when |name_| is empty.
   base::string16 GetAddressWithLocalizedDeviceTypeName() const;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_H_