Remove the local help content for about:net-internals.

chrome/browser/resources/net_internals/export_view.html

 <style>
 
 .export-view-explanation-warning {
   border: 2px solid red;
 }
 
 #export-view-privacy-warning {
   padding: 5px;
   color: red;
   border: 1px solid red;
@@ skipping 27 matching lines @@
     <div>
       <button id=export-view-save-log-file>Dump to file</button>
     </div>
     <pre id=export-view-save-status-text></pre>
 
     <ul>
       <li><b>IMPORTANT</b>: First reproduce the problem while in recording mode.</li>
     </ul>
     <p>
       For more information see: 
-      <a href="chrome://net-internals/help.html" target="_blank">
-        How to get data for bug reports?
+      <a href="https://sites.google.com/a/chromium.org/dev/for-testers/providing-network-details" target="_blank">
+        Providing network details for bug reports
       </a>
     </p>
   </div>
 
   <a style="display: none" id=export-view-download-anchor download="net-internals-log.json"></a>
 
 </div>