bluetooth: Rename to WebBluetooth in preparation for new WebBluetooth flag.

Source/modules/bluetooth/BluetoothInteraction.idl

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // https://webbluetoothcg.github.io/web-bluetooth/#idl-def-bluetoothinteraction
 
 // Implement BluetoothInteraction interface: https://crbug.com/476985
 
 [
     GarbageCollected,
     NoInterfaceObject,
-    RuntimeEnabled=Bluetooth,
+    RuntimeEnabled=WebBluetooth,
 ] interface BluetoothInteraction {
     readonly    attribute BluetoothUUIDs uuids;
     // Promise<BluetoothGATTService>        getService(DOMString serviceInstanceID);
     // Promise<BluetoothGATTCharacteristic> getCharacteristic(DOMString characteristicInstanceID);
     // Promise<BluetoothGATTDescriptor>     getDescriptor(DOMString descriptorInstanceID);
 };