Make Web Push use InstanceID tokens instead of GCM registrations

content/public/browser/push_messaging_service.h

Index: content/public/browser/push_messaging_service.h
diff --git a/content/public/browser/push_messaging_service.h b/content/public/browser/push_messaging_service.h
index 993e2816da86d1240382717912c1b2c1c5849bc4..e6dda4b2346e4cdee6f5c1e21c6734f4629f914c 100644
--- a/content/public/browser/push_messaging_service.h
+++ b/content/public/browser/push_messaging_service.h
@@ -79,7 +79,6 @@ class CONTENT_EXPORT PushMessagingService {
   // sent to the push service, with automatic retry.
   virtual void Unsubscribe(const GURL& requesting_origin,
                            int64_t service_worker_registration_id,
-                           const std::string& sender_id,
                            const UnregisterCallback& callback) = 0;
 
   // Checks the permission status for the |origin|. The |user_visible| boolean
@@ -110,11 +109,6 @@ class CONTENT_EXPORT PushMessagingService {
       const ResultCallback& callback);
 
  protected:
-  static void GetSenderId(BrowserContext* browser_context,
-                          const GURL& origin,
-                          int64_t service_worker_registration_id,
-                          const StringCallback& callback);
-
   // Clear the push subscription id stored in the service worker with the given
   // |service_worker_registration_id| for the given |origin|.
   static void ClearPushSubscriptionID(BrowserContext* browser_context,