Refactor BeforeInstallPromptEvent to use ScriptPromiseProperty

Source/modules/app_banner/AppBannerCallbacks.h

Index: Source/modules/app_banner/AppBannerCallbacks.h
diff --git a/Source/modules/app_banner/AppBannerCallbacks.h b/Source/modules/app_banner/AppBannerCallbacks.h
new file mode 100644
index 0000000000000000000000000000000000000000..d30bba9ff1daa47aa1a9c51d638bc787225c1022
--- /dev/null
+++ b/Source/modules/app_banner/AppBannerCallbacks.h
@@ -0,0 +1,27 @@
+// 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 AppBannerCallbacks_h
+#define AppBannerCallbacks_h
+
+#include "modules/app_banner/BeforeInstallPromptEvent.h"
+#include "public/platform/modules/app_banner/WebAppBannerClient.h"
+
+namespace blink {
+
+class AppBannerCallbacks : public WebAppBannerCallbacks {
+public:
+    AppBannerCallbacks(BeforeInstallPromptEvent::UserChoiceProperty*);

[yhirano, 2015/07/24 03:41:16]

+explicit

[dominickn, 2015/07/24 05:02:09]

Done.

+    virtual ~AppBannerCallbacks() { }

[yhirano, 2015/07/24 03:41:16]

"~AppBannerCallbacks() override" is more preferable.

[dominickn, 2015/07/24 05:02:09]

Done.

+
+    // WebAppBannerCallbacks overrides.
+    void onSuccess(WebAppBannerPromptResult*) override;
+
+private:
+    Persistent<BeforeInstallPromptEvent::UserChoiceProperty> m_userChoice;
+};
+
+} // namespace blink
+
+#endif // AppBannerCallbacks_h