Have ScriptPromiseResolver on the Oilpan heap always.

Source/modules/audio_output_devices/SetSinkIdCallbacks.h

Index: Source/modules/audio_output_devices/SetSinkIdCallbacks.h
diff --git a/Source/modules/audio_output_devices/SetSinkIdCallbacks.h b/Source/modules/audio_output_devices/SetSinkIdCallbacks.h
index 023023b2d19e79b2f31ecaf85709a662ddd8d080..463044b419990814480aafeaa0cf71a225a59337 100644
--- a/Source/modules/audio_output_devices/SetSinkIdCallbacks.h
+++ b/Source/modules/audio_output_devices/SetSinkIdCallbacks.h
@@ -9,7 +9,6 @@
 #include "platform/heap/Handle.h"
 #include "public/platform/WebCallbacks.h"
 #include "wtf/Noncopyable.h"
-#include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
@@ -21,14 +20,14 @@ struct WebSetSinkIdError;
 class SetSinkIdCallbacks final : public WebCallbacks<void, WebSetSinkIdError> {
     WTF_MAKE_NONCOPYABLE(SetSinkIdCallbacks);
 public:
-    SetSinkIdCallbacks(PassRefPtrWillBeRawPtr<ScriptPromiseResolver>, HTMLMediaElement&, const String& sinkId);
+    SetSinkIdCallbacks(ScriptPromiseResolver*, HTMLMediaElement&, const String& sinkId);
     ~SetSinkIdCallbacks() override;
 
     void onSuccess() override;
     void onError(WebSetSinkIdError*) override;
 
 private:
-    RefPtrWillBePersistent<ScriptPromiseResolver> m_resolver;
+    Persistent<ScriptPromiseResolver> m_resolver;
     RefPtrWillBePersistent<HTMLMediaElement> m_element;
     String m_sinkId;
 };