Add field trial to extend prerender expiration to 5 minutes.

chrome/browser/resources/net_internals/prerender_view.js

 // Copyright (c) 2012 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.
 
 /**
  * This view displays information related to Prerendering.
  */
 var PrerenderView = (function() {
   'use strict';
 
@@ skipping 39 matching lines @@
 
     onPrerenderInfoChanged: function(prerenderInfo) {
       this.prerenderEnabledSpan_.textContent = '';
       this.prerenderOmniboxEnabledSpan_.textContent = '';
       this.prerenderHistoryDiv_.innerHTML = '';
       this.prerenderActiveDiv_.innerHTML = '';
 
       if (prerenderInfo && ('enabled' in prerenderInfo)) {
         this.prerenderEnabledSpan_.textContent =
             prerenderInfo.enabled.toString();
-        if (prerenderInfo.disabled_reason) {
+        if (prerenderInfo.enabled_note) {
           this.prerenderEnabledSpan_.textContent +=
-              ' ' + prerenderInfo.disabled_reason;
+              ' ' + prerenderInfo.enabled_note;
         }
       }
 
       if (prerenderInfo && ('omnibox_enabled' in prerenderInfo)) {
         this.prerenderOmniboxEnabledSpan_.textContent =
             prerenderInfo.omnibox_enabled.toString();
       }
 
       if (!isValidPrerenderInfo(prerenderInfo))
         return false;
@@ skipping 50 matching lines @@
       var activeEntry = prerenderActive[i];
       tablePrinter.addRow();
       tablePrinter.addCell(activeEntry.url);
       tablePrinter.addCell(activeEntry.duration);
     }
     return tablePrinter;
   }
 
   return PrerenderView;
 })();