Implement WebBluetooth getDescriptor[s]

third_party/WebKit/LayoutTests/bluetooth/script-tests/descriptor-invalid-name.js

+'use strict';
+promise_test(() => {
+  let promise;
+  return setBluetoothFakeAdapter('DisconnectingHealthThermometerAdapter')
+    .then(() => requestDeviceWithKeyDown({
+      filters: [{services: ['health_thermometer']}]}))
+    .then(device => device.gatt.connect())
+    .then(gattServer => gattServer.getPrimaryService('health_thermometer'))
+    .then(service => service.getCharacteristic('measurement_interval'))
+

[ortuno, 2016/12/02 06:14:50]

nit: remote blank line.

[dougt, 2016/12/02 18:31:28]

Done.

+    .then(characteristic => {
+      promise = assert_promise_rejects_with_message(

[ortuno, 2016/12/02 06:14:50]

You can just return the promise. No need to save it to garbage collect.

[dougt, 2016/12/02 18:31:28]

Done.

+        characteristic.CALLS([
+          getDescriptor('invalid-name')|
+          getDescriptors('invalid-name')]),
+          new DOMException(
+              'Failed to execute \'FUNCTION_NAME\' on ' +
+                  '\'BluetoothRemoteGATTCharacteristic\': Invalid Descriptor name: ' +
+                  '\'invalid-name\'. ' +
+                  'It must be a valid UUID alias (e.g. 0x1234), ' +
+                  'UUID (lowercase hex characters e.g. ' +
+                  '\'00001234-0000-1000-8000-00805f9b34fb\'), ' +
+                  'or recognized standard name from ' +
+                  'https://developer.bluetooth.org/gatt/descriptors/' +
+                  'Pages/DescriptorsHomePage.aspx' +
+                  ' e.g. \'gatt.characteristic_presentation_format\'.',
+              'TypeError'));
+      // Disconnect called to clear attributeInstanceMap and allow the
+      // object to get garbage collected.
+      characteristic.service.device.gatt.disconnect();

[ortuno, 2016/12/02 06:14:50]

No need to disconnect.

[dougt, 2016/12/02 18:31:28]

Done.

+    })
+    .then(runGarbageCollection)
+    .then(() => promise);
+}, 'Garbage Collection ran during a FUNCTION_NAME call that succeeds. ' +
+   'Should not crash.');