Implement //device/bt changes for notifications.

device/bluetooth/test/bluetooth_test_bluez.h

Index: device/bluetooth/test/bluetooth_test_bluez.h
diff --git a/device/bluetooth/test/bluetooth_test_bluez.h b/device/bluetooth/test/bluetooth_test_bluez.h
index 3f14e14e566ea21179efb6336458e6fec4ce21ff..cef44deb30af685ecd823e3ad55b4642a25111eb 100644
--- a/device/bluetooth/test/bluetooth_test_bluez.h
+++ b/device/bluetooth/test/bluetooth_test_bluez.h
@@ -57,6 +57,12 @@ class BluetoothTestBlueZ : public BluetoothTestBase {
       const std::vector<uint8_t>& value_to_write,
       const base::Closure& success_callback,
       const base::Closure& error_callback) override;
+  bool SimulateLocalGattCharacteristicNotificationsRequest(
+      BluetoothLocalGattService* service,
+      BluetoothLocalGattCharacteristic* characteristic,
+      bool start) override;
+  std::vector<uint8_t> LastNotifactionValueForCharacteristic(
+      BluetoothLocalGattCharacteristic* characteristic) override;
   std::vector<BluetoothLocalGattService*> RegisteredGattServices() override;
 
  private: