[AppBanner] Blink implementation of an event when an install banner is shown.

public/platform/modules/app_banner/WebAppBannerPromptReply.h

Index: public/platform/modules/app_banner/WebAppBannerPromptReply.h
diff --git a/public/platform/modules/app_banner/WebAppBannerPromptReply.h b/public/platform/modules/app_banner/WebAppBannerPromptReply.h
new file mode 100644
index 0000000000000000000000000000000000000000..9781aa600bb62f2aaae53a0be18e6865bae0a2a1
--- /dev/null
+++ b/public/platform/modules/app_banner/WebAppBannerPromptReply.h
@@ -0,0 +1,17 @@
+// 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 WebAppBannerPromptReply_h
+#define WebAppBannerPromptReply_h
+
+namespace blink {
+
+enum class WebAppBannerPromptReply {
+    None = 0,

[Mike West, 2015/03/06 20:17:45]

Nit: WebAppBannerPromptReplyNone and WebAppBannerPromptReplyCancel.

[mlamouri (slow - plz ping), 2015/03/06 20:42:04]

With "enum class", AFAIK, you would have to do
WebAppBannerPromptReply::WebAppBannerPromptReplyNone (see
AppBannerController.cpp).

It seems that other WebKit "enum class" follow the same pattern:
https://code.google.com/p/chromium/codesearch#search/&sq=package:chromium&q=%...

+    Cancel
+};
+
+} // namespace blink
+
+#endif // WebAppBannerPromptReply_h