Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/audio_output_devices/SetSinkIdCallbacks.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/audio_output_devices/SetSinkIdCallbacks.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/audio_output_devices/HTMLMediaElementAudioOutputDevice.h"
 #include "platform/Logging.h"
 #include "public/platform/WebSetSinkIdError.h"
 
 namespace blink {
 
-SetSinkIdCallbacks::SetSinkIdCallbacks(PassRefPtrWillBeRawPtr<ScriptPromiseResolver> resolver, HTMLMediaElement& element, const String& sinkId)
+SetSinkIdCallbacks::SetSinkIdCallbacks(ScriptPromiseResolver* resolver, HTMLMediaElement& element, const String& sinkId)
     : m_resolver(resolver)
     , m_element(element)
     , m_sinkId(sinkId)
 {
     ASSERT(m_resolver);
     WTF_LOG(Media, __FUNCTION__);
 }
 
 SetSinkIdCallbacks::~SetSinkIdCallbacks()
 {
@@ skipping 29 matching lines @@
         break;
     case WebSetSinkIdError::ErrorTypeAbort:
         m_resolver->reject(DOMException::create(AbortError, error->message));
         break;
     default:
         ASSERT_NOT_REACHED();
     }
 }
 
 } // namespace blink