Oilpan: have DOMException be on the heap by default.

Source/modules/vr/NavigatorVRDevice.cpp

 // 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.
 
 #include "config.h"
 #include "modules/vr/NavigatorVRDevice.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/Document.h"
@@ skipping 36 matching lines @@
 }
 
 ScriptPromise NavigatorVRDevice::getVRDevices(ScriptState* scriptState)
 {
     RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
     Document* document = m_frame ? m_frame->document() : 0;
 
     if (!document || !controller()) {
-        RefPtrWillBeRawPtr<DOMException> exception = DOMException::create(InvalidStateError, "The object is no longer associated to a document.");
+        DOMException* exception = DOMException::create(InvalidStateError, "The object is no longer associated to a document.");
         resolver->reject(exception);
         return promise;
     }
 
     controller()->getDevices(new VRGetDevicesCallback(resolver, m_hardwareUnits.get()));
 
     return promise;
 }
 
 VRController* NavigatorVRDevice::controller()
@@ skipping 21 matching lines @@
 NavigatorVRDevice::~NavigatorVRDevice()
 {
 }
 
 const char* NavigatorVRDevice::supplementName()
 {
     return "NavigatorVRDevice";
 }
 
 } // namespace blink