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..20abee0979c2fd994465c3f7f5f7e5af8a7d5b6d
--- /dev/null
+++ b/Source/modules/app_banner/AppBannerCallbacks.h
@@ -0,0 +1,28 @@
+// 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 "public/platform/modules/app_banner/WebAppBannerClient.h"
+
+namespace blink {
+
+class BeforeInstallPromptEvent;
+
+class AppBannerCallbacks : public WebAppBannerCallbacks {
+public:
+    AppBannerCallbacks(BeforeInstallPromptEvent*);
+    virtual ~AppBannerCallbacks() { }
+
+    // WebAppBannerCallbacks overrides.
+    void onSuccess(WebAppBannerPromptResult*) override;
+
+private:
+    BeforeInstallPromptEvent* m_event;

[yhirano, 2015/07/23 12:25:02]

[optional] It would be possible to have the ScriptPromiseProperty instead of
BeforeInstallPromptEvent.

[yhirano, 2015/07/23 12:25:02]

Persistent<BeforeInstallPromptEvent>?

[dominickn, 2015/07/23 13:13:48]

Done.

[dominickn, 2015/07/23 13:13:48]

Done.

+};
+
+} // namespace blink
+
+#endif // AppBannerCallbacks_h