Fix discovery of Smart Lock service in Proximity Auth over Blutooth Low Energy.

components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h

 // 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.
 
 #ifndef COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_CONNECTION_FINDER_H
 #define COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_CONNECTION_FINDER_H
 
+#include <set>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "components/proximity_auth/connection_finder.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_device.h"
 #include "device/bluetooth/bluetooth_discovery_session.h"
 #include "device/bluetooth/bluetooth_gatt_connection.h"
 
 namespace proximity_auth {
 
 // This ConnectionFinder implementation is specialized in finding a Bluetooth
 // Low Energy remote device.
 class BluetoothLowEnergyConnectionFinder
     : public ConnectionFinder,
       public device::BluetoothAdapter::Observer {
  public:
   BluetoothLowEnergyConnectionFinder(const std::string& remote_service_uuid);
   ~BluetoothLowEnergyConnectionFinder() override;
 
   // Finds a connection to the remote device. Only the first one is functional.
   void Find(const device::BluetoothDevice::GattConnectionCallback&
                 connection_callback);
   void Find(const ConnectionCallback& connection_callback) override;
 
+  // Closes the connection and forgets the device.
+  void CloseConnection(scoped_ptr<device::BluetoothGattConnection> connection);
+
  protected:
   // device::BluetoothAdapter::Observer:
   void DeviceAdded(device::BluetoothAdapter* adapter,
                    device::BluetoothDevice* device) override;
+  void DeviceChanged(device::BluetoothAdapter* adapter,
+                     device::BluetoothDevice* device) override;
+  void DeviceRemoved(device::BluetoothAdapter* adapter,
+                     device::BluetoothDevice* device) override;
 
  private:
   // Callback to be called when the Bluetooth adapter is initialized.
   void OnAdapterInitialized(scoped_refptr<device::BluetoothAdapter> adapter);
 
   // Checks if |remote_device| contains |remote_service_uuid| and creates a
   // connection in that case.
-  void HandleDeviceAdded(device::BluetoothDevice* remote_device);
+  void HandleDeviceUpdated(device::BluetoothDevice* remote_device);
 
   // Callback called when a new discovery session is started.
   void OnDiscoverySessionStarted(
       scoped_ptr<device::BluetoothDiscoverySession> discovery_session);
 
   // Callback called when there is an error starting a new discovery session.
   void OnStartDiscoverySessionError();
 
   // Starts a discovery session for |adapter_|.
   void StartDiscoverySession();
 
   // Callback called when |discovery_session_| is stopped.
   void OnDiscoverySessionStopped();
 
   // Callback called when there is an error stopping |discovery_session_|.
   void OnStopDiscoverySessionError();
 
   // Stops the discovery session given by |discovery_session_|.
   void StopDiscoverySession();
 
   // Checks if a service with |service_uuid| is offered by |remote_device|.
   bool HasService(device::BluetoothDevice* remote_device);
 
   // Callback called when there is an error creating the connection.
   void OnCreateConnectionError(
+      std::string device_address,
       device::BluetoothDevice::ConnectErrorCode error_code);
 
   // Callback called when the connection is created.
   void OnConnectionCreated(
       scoped_ptr<device::BluetoothGattConnection> connection);
 
   // Creates a GATT connection with |remote_device|, |connection_callback_| will
   // be called once the connection is established.
   void CreateConnection(device::BluetoothDevice* remote_device);
 
   // The uuid of the service it looks for to establish a GattConnection.
   device::BluetoothUUID remote_service_uuid_;
 
   // The Bluetooth adapter over which the Bluetooth connection will be made.
   scoped_refptr<device::BluetoothAdapter> adapter_;
 
   // The discovery session associated to this object.
   scoped_ptr<device::BluetoothDiscoverySession> discovery_session_;
 
-  // True if there is a connection.
+  // True if a connection was established to a remove device that has the
+  // service |remote_service_uuid|.
   bool connected_;
 
   // Callback called when the connection is established.
   device::BluetoothDevice::GattConnectionCallback connection_callback_;
 
+  // The set of devices this connection finder has tried to connect to.
+  std::set<device::BluetoothDevice*> pending_connections_;
+
   base::WeakPtrFactory<BluetoothLowEnergyConnectionFinder> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothLowEnergyConnectionFinder);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_CONNECTION_FINDER_H