Add support in Chrome to send notifications to a specific device.

device/bluetooth/test/bluetooth_test.cc

Index: device/bluetooth/test/bluetooth_test.cc
diff --git a/device/bluetooth/test/bluetooth_test.cc b/device/bluetooth/test/bluetooth_test.cc
index de47f463ad31415623f0027765b0a09e388a5ebb..b45b046d3e79016fea5d2b9373070a6b7b71df6f 100644
--- a/device/bluetooth/test/bluetooth_test.cc
+++ b/device/bluetooth/test/bluetooth_test.cc
@@ -75,10 +75,11 @@ bool BluetoothTestBase::SimulateLocalGattCharacteristicNotificationsRequest(
   return false;
 }
 
-std::vector<uint8_t> BluetoothTestBase::LastNotifactionValueForCharacteristic(
+BluetoothTestBase::NotificationType
+BluetoothTestBase::LastNotifactionValueForCharacteristic(
     BluetoothLocalGattCharacteristic* characteristic) {
   NOTIMPLEMENTED();
-  return std::vector<uint8_t>();
+  return NotificationType();
 }
 
 std::vector<BluetoothLocalGattService*>