Push registration should read a "gcm_user_visible_only" key from the Manifest.

content/public/browser/push_messaging_service.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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_PUSH_MESSAGING_SERVICE_H_
 #define CONTENT_PUBLIC_BROWSER_PUSH_MESSAGING_SERVICE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 20 matching lines @@
   virtual GURL PushEndpoint() = 0;
 
   // Register the given |sender_id| with the push messaging service in a
   // document context. The frame is known and a permission UI may be displayed
   // to the user.
   virtual void RegisterFromDocument(const GURL& requesting_origin,
                                     int64 service_worker_registration_id,
                                     const std::string& sender_id,
                                     int renderer_id,
                                     int render_frame_id,
-                                    bool user_gesture,
+                                    bool user_visible_only,
                                     const RegisterCallback& callback) = 0;
 
   // Register the given |sender_id| with the push messaging service. The frame
   // is not known so if permission was not previously granted by the user this
   // request should fail.
   virtual void RegisterFromWorker(const GURL& requesting_origin,
                                   int64 service_worker_registration_id,
                                   const std::string& sender_id,
                                   const RegisterCallback& callback) = 0;
 
@@ skipping 10 matching lines @@
   // ever granted when the requesting origin matches the top level embedding
   // origin.
   virtual blink::WebPushPermissionStatus GetPermissionStatus(
       const GURL& requesting_origin,
       const GURL& embedding_origin) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PUSH_MESSAGING_SERVICE_H_