Allow dumping raw json fetched from the server.

chrome/browser/resources/snippets_internals.js

 // Copyright 2016 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.
 
 cr.define('chrome.SnippetsInternals', function() {
   'use strict';
 
   function initialize() {
     $('submit-download').addEventListener('click', function(event) {
-      chrome.send('download', [$('hosts-input').value]);
+      chrome.send('download',
+                  [$('hosts-input').value, $('download-dump').checked]);
       event.preventDefault();
     });
 
     $('submit-clear').addEventListener('click', function(event) {
       chrome.send('clear');
       event.preventDefault();
     });
 
     $('submit-dump').addEventListener('click', function(event) {
       chrome.send('dump');
@@ skipping 71 matching lines @@
     receiveProperty: receiveProperty,
     receiveHosts: receiveHosts,
     receiveSnippets: receiveSnippets,
     receiveDiscardedSnippets: receiveDiscardedSnippets,
     receiveJson: receiveJson,
   };
 });
 
 document.addEventListener('DOMContentLoaded',
                           chrome.SnippetsInternals.initialize);