Adding BLE connection finder unit tests.

components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h

Index: components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h
diff --git a/components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h b/components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h
index 4c421e25b8690525e01ea13e8061ae71a0d2ceee..047531b1faa82aec957532a7d09595cab4155341 100644
--- a/components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h
+++ b/components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h
@@ -48,7 +48,6 @@ class BluetoothLowEnergyConnectionFinder
                                  Connection::Status old_status,
                                  Connection::Status new_status) override;
 
- protected:
   // device::BluetoothAdapter::Observer:
   void DeviceAdded(device::BluetoothAdapter* adapter,
                    device::BluetoothDevice* device) override;
@@ -57,6 +56,12 @@ class BluetoothLowEnergyConnectionFinder
   void DeviceRemoved(device::BluetoothAdapter* adapter,
                      device::BluetoothDevice* device) override;
 
+ protected:
+  // Creates a proximity_auth::Connection based on |gatt_connection|. Exposed
+  // for testing.
+  virtual scoped_ptr<Connection> CreateConnection(
+      scoped_ptr<device::BluetoothGattConnection> gatt_connection);
+
  private:
   // Callback to be called when the Bluetooth adapter is initialized.
   void OnAdapterInitialized(scoped_refptr<device::BluetoothAdapter> adapter);
@@ -100,10 +105,6 @@ class BluetoothLowEnergyConnectionFinder
   // be called once the connection is established.
   void CreateGattConnection(device::BluetoothDevice* remote_device);
 
-  // Creates a connection with |remote_device|.
-  scoped_ptr<Connection> CreateConnection(
-      scoped_ptr<device::BluetoothGattConnection> gatt_connection);
-
   // The uuid of the service it looks for to establish a GattConnection.
   device::BluetoothUUID remote_service_uuid_;