Deliver action clicks to page notifications (chromium)

content/common/platform_notification_messages.h

 // Copyright 2014 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.
 
 // Messages for platform-native notifications using the Web Notification API.
 // Multiply-included message file, hence no include guard.
 
 #include <stdint.h>
 #include <string>
 #include <utility>
@@ skipping 45 matching lines @@
 // Messages sent from the browser to the renderer.
 
 // Informs the renderer that the browser has displayed the notification.
 IPC_MESSAGE_CONTROL1(PlatformNotificationMsg_DidShow,
                      int /* notification_id */)
 
 // Informs the renderer that the notification has been closed.
 IPC_MESSAGE_CONTROL1(PlatformNotificationMsg_DidClose,
                      int /* notification_id */)
 
-// Informs the renderer that the notification has been clicked on.
-IPC_MESSAGE_CONTROL1(PlatformNotificationMsg_DidClick,
-                     int /* notification_id */)
+// Informs the renderer that the notification or one of its actions have been
+// clicked on. |action_index| is the index of the action, or -1 if the main body
+// of the notification was clicked.
+IPC_MESSAGE_CONTROL2(PlatformNotificationMsg_DidClick,
+                     int /* notification_id */,
+                     int /* action_index */)
 
 // Reply to PlatformNotificationHostMsg_ShowPersistent indicating that a
 // persistent notification has been shown on the platform (if |success| is
 // true), or that an unspecified error occurred.
 IPC_MESSAGE_CONTROL2(PlatformNotificationMsg_DidShowPersistent,
                      int /* request_id */,
                      bool /* success */)
 
 // Reply to PlatformNotificationHostMsg_GetNotifications sharing a vector of
 // available notifications per the request's constraints.
@@ skipping 26 matching lines @@
 IPC_MESSAGE_CONTROL1(PlatformNotificationHostMsg_Close,
                      int /* notification_id */)
 
 IPC_MESSAGE_CONTROL2(PlatformNotificationHostMsg_ClosePersistent,
                      GURL /* origin */,
                      int64_t /* persistent_notification_id */)
 
 IPC_SYNC_MESSAGE_CONTROL1_1(PlatformNotificationHostMsg_CheckPermission,
                             GURL /* origin */,
                             blink::WebNotificationPermission /* result */)