Implement the Blink side of RequestDeviceOptions.

LayoutTests/bluetooth/bluetooth-helpers.js

+var genericAccessServiceUuid = '00001800-0000-1000-8000-00805f9b34fb';
+var genericAttributeServiceUuid = '00001801-0000-1000-8000-00805f9b34fb';
+var glucoseServiceUuid = '00001808-0000-1000-8000-00805f9b34fb';
+var heartRateServiceUuid = '0000180d-0000-1000-8000-00805f9b34fb';
+var batteryServiceUuid = '0000180f-0000-1000-8000-00805f9b34fb';
+
 var promise_tests = Promise.resolve();
 // Helper function to run promise tests one after the other.
 // TODO(ortuno): Remove once https://github.com/w3c/testharness.js/pull/115/files
 // gets through.
 function sequential_promise_test(func, name) {
   var test = async_test(name);
   promise_tests = promise_tests.then(function() {
     return test.step(func, test, test);
   }).then(function() {
     test.done();
   }).catch(test.step_func(function(value) {
     // step_func catches the error again so the error doesn't propagate.
     throw value;
   }));
 }