Implement WebBluetooth getDescriptor[s]

content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.h

Index: content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.h
diff --git a/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.h b/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.h
index 114de82d0233a5a7a3d8eb2c15399b67154646a3..6b6342edf6106cdfddc20b114ecc81d29c8b02b7 100644
--- a/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.h
+++ b/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.h
@@ -332,6 +332,13 @@ class LayoutTestBluetoothAdapterProvider {
   //           - StartNotifySession: Run success callback.
   //           - GetProperties: Returns
   //               BluetoothRemoteGattCharacteristic::PROPERTY_READ
+  //           - Descriptors
+  //             - User Description (2901)
+  //             - Client Characteristic Configuration (2902)
+  //                 Note: This descriptor is blocklisted for writes.
+  //             - bad2ddcf-60db-45cd-bef9-fd72b153cf7c
+  //                 A test descriptor that is blocklisted.
+
   static scoped_refptr<testing::NiceMock<device::MockBluetoothAdapter>>
   GetDisconnectingHealthThermometer();