Oilpan: fix build after r194169.

Source/modules/bluetooth/BluetoothDevice.cpp

Index: Source/modules/bluetooth/BluetoothDevice.cpp
diff --git a/Source/modules/bluetooth/BluetoothDevice.cpp b/Source/modules/bluetooth/BluetoothDevice.cpp
index 985319686ec0da11f2ea90cecba4e672edd2b63e..2d9552a950762b3fef6a4061330d912b48b4d6fb 100644
--- a/Source/modules/bluetooth/BluetoothDevice.cpp
+++ b/Source/modules/bluetooth/BluetoothDevice.cpp
@@ -92,7 +92,7 @@ ScriptPromise BluetoothDevice::connectGATT(ScriptState* scriptState)
     WebBluetooth* webbluetooth = Platform::current()->bluetooth();
     if (!webbluetooth)
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError));
-    RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
     webbluetooth->connectGATT(instanceID(), new CallbackPromiseAdapter<BluetoothGATTRemoteServer, BluetoothError>(resolver));
     return promise;