[Offline Prefetch] Create a new JobScheduler task to wake up for net activity.

chrome/browser/resources/offline_pages/offline_internals.js

Index: chrome/browser/resources/offline_pages/offline_internals.js
diff --git a/chrome/browser/resources/offline_pages/offline_internals.js b/chrome/browser/resources/offline_pages/offline_internals.js
index 7bd8055be940705b7cf6f0ece5d7e6d319b6cb08..892b5a5b6794b2abbe267f1e397a4d892a1bbeb5 100644
--- a/chrome/browser/resources/offline_pages/offline_internals.js
+++ b/chrome/browser/resources/offline_pages/offline_internals.js
@@ -292,6 +292,12 @@ cr.define('offlineInternals', function() {
             });
       }
     };
+    $('schedule-nwake').onclick = function() {
+      browserProxy_.scheduleNwake();
+    }
+    $('cancel-nwake').onclick = function() {
+      browserProxy_.cancelNwake();
+    }
     if (!incognito)
       refreshAll();
   }