CallbackPromiseAdapter types should be more compatible with WebCallbacks (1/3).

Source/modules/app_banner/AppBannerPromptResult.h

 // 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.
 
 #ifndef AppBannerPromptResult_h
 #define AppBannerPromptResult_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "public/platform/modules/app_banner/WebAppBannerPromptResult.h"
 #include "wtf/Noncopyable.h"
+#include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ScriptPromiseResolver;
 
 class AppBannerPromptResult final : public GarbageCollectedFinalized<AppBannerPromptResult>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
     WTF_MAKE_NONCOPYABLE(AppBannerPromptResult);
 public:
     // Support for CallbackPromiseAdapter:
-    typedef blink::WebAppBannerPromptResult WebType;
+    using WebType = OwnPtr<blink::WebAppBannerPromptResult>;
     static AppBannerPromptResult* take(ScriptPromiseResolver*, PassOwnPtr<WebAppBannerPromptResult> webInstance);
 
     static AppBannerPromptResult* create(const AtomicString& platform, WebAppBannerPromptResult::Outcome outcome)
     {
         return new AppBannerPromptResult(platform, outcome);
     }
 
     virtual ~AppBannerPromptResult();
 
     String platform() const { return m_platform; }
     String outcome() const;
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 
 private:
     AppBannerPromptResult(const AtomicString& platform, WebAppBannerPromptResult::Outcome);
 
     String m_platform;
     WebAppBannerPromptResult::Outcome m_outcome;
 };
 
 } // namespace blink
 
 #endif // AppBannerPromptResult_h