Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/bluetooth/BluetoothDevice.cpp

 // Copyright 2014 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.
 
 #include "config.h"
 #include "modules/bluetooth/BluetoothDevice.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
@@ skipping 62 matching lines @@
     for (size_t i = 0; i < m_webDevice->uuids.size(); ++i)
         uuids[i] = m_webDevice->uuids[i];
     return uuids;
 }
 
 ScriptPromise BluetoothDevice::connectGATT(ScriptState* scriptState)
 {
     WebBluetooth* webbluetooth = Platform::current()->bluetooth();
     if (!webbluetooth)
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError));
-    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
     webbluetooth->connectGATT(instanceID(), new CallbackPromiseAdapter<BluetoothGATTRemoteServer, BluetoothError>(resolver));
     return promise;
 }
 
 } // namespace blink