Implement receiving side of web notification inline replies

third_party/WebKit/public/platform/modules/notifications/WebNotificationAction.h

Index: third_party/WebKit/public/platform/modules/notifications/WebNotificationAction.h
diff --git a/third_party/WebKit/public/platform/modules/notifications/WebNotificationAction.h b/third_party/WebKit/public/platform/modules/notifications/WebNotificationAction.h
index c42b47d1384e4cf656f8ac6b4cc11679dcef5239..b103e7e88630c4f293ba9860d440d82f793b0f9c 100644
--- a/third_party/WebKit/public/platform/modules/notifications/WebNotificationAction.h
+++ b/third_party/WebKit/public/platform/modules/notifications/WebNotificationAction.h
@@ -12,9 +12,11 @@ namespace blink {
 
 // Structure representing the data associated with a Web Notification action.
 struct WebNotificationAction {
+    WebString type;

[Mike West, 2016/04/05 14:41:00]

From `NotificationAction.idl`, it looks like this is an enum of `button` or
`text`. Why store/IPC it as a String?

[Nina, 2016/04/05 16:10:01]

It's being stored and sent through IPC as an enum (see
PlatformNotificationData). However, this here should also be an enum. Updated
the code.

     WebString action;
     WebString title;
     WebURL icon;
+    WebString placeholder;
 };
 
 } // namespace blink