Enable ServiceWorkerNavigationPreload by default for Origin-Trial.

content/browser/service_worker/service_worker_version.h

 // Copyright 2013 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_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 421 matching lines @@
                              base::Time dispatch_event_time);
 
   void NotifyMainScriptRequestHandlerCreated();
   void NotifyMainScriptJobCreated(
       ServiceWorkerContextRequestHandler::CreateJobStatus status);
 
   // Returns the Navigation Preload support status of the service worker.
   //  - Origin Trial: Have an effective token.
   //                                 Command line
   //                             Default  Enable  Disabled
-  //                   Default      B1      A        B2
+  //                   Default      A       A        B2
   //      Field trial  Enabled      A       A        B2
   //                   Disabled     B1      A        B2
   //
   //  - Origin Trial: No token.
   //                                 Command line
   //                             Default  Enable  Disabled
   //                   Default      C       A        C
   //      Field trial  Enabled      C       A        C
   //                   Disabled     C       A        C
   //
@@ skipping 447 matching lines @@
 
   // At this point |this| can have been deleted, so don't do anything other
   // than returning.
 
   return true;
 }
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_VERSION_H_