Oilpan: have DOMException be on the heap by default.

Source/modules/bluetooth/BluetoothError.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/BluetoothError.h"
 
+#include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "public/platform/modules/bluetooth/WebBluetoothError.h"
 #include "wtf/OwnPtr.h"
 
 namespace blink {
 
-PassRefPtrWillBeRawPtr<DOMException> BluetoothError::take(ScriptPromiseResolver*, WebBluetoothError* webErrorRawPointer)
+DOMException* BluetoothError::take(ScriptPromiseResolver*, WebBluetoothError* webErrorRawPointer)
 {
     OwnPtr<WebBluetoothError> webError = adoptPtr(webErrorRawPointer);
     switch (webError->errorType) {
     case WebBluetoothError::SecurityError:
         return DOMException::create(SecurityError, webError->message);
     case WebBluetoothError::NotFoundError:
         return DOMException::create(NotFoundError, webError->message);
     }
     ASSERT_NOT_REACHED();
     return DOMException::create(UnknownError);
 }
 
 void BluetoothError::dispose(WebBluetoothError* webErrorRaw)
 {
     delete webErrorRaw;
 }
 
 } // namespace blink