Fix WebBluetooth generator to distinguish between different methods.

third_party/WebKit/LayoutTests/bluetooth/script-tests/server/delayed-discovery-no-permission-for-any-service.js

 'use strict';
 promise_test(() => {
   return setBluetoothFakeAdapter('DelayedServicesDiscoveryAdapter')
     .then(() => requestDeviceWithKeyDown({
       filters: [{name: 'Heart Rate Device'}]}))
     .then(device => device.gatt.connect())
     .then(gattServer => assert_promise_rejects_with_message(
         gattServer.CALLS([
           getPrimaryService('heart_rate')|
           getPrimaryServices()|
           getPrimaryServices('heart_rate')[UUID]]),
         new DOMException('Origin is not allowed to access any service. Tip: ' +
                          'Add the service UUID to \'optionalServices\' in ' +
                          'requestDevice() options. https://goo.gl/HxfxSQ',
                          'SecurityError')));
 }, 'Delayed service discovery, request for present service without ' +
    'permission to access any service. Reject with SecurityError.');
 </script>