Make GetDismissedSuggestionsForDebugging asynchronous

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';
 
   // Stores the list of suggestions we received in receiveContentSuggestions.
   var lastSuggestions = [];
 
@@ skipping 50 matching lines @@
         document.getElementsByClassName('submit-clear-cached-suggestions');
     for (var button of clearCachedButtons) {
       button.addEventListener('click', onClearCachedButtonClicked);
     }
 
     var clearDismissedButtons =
         document.getElementsByClassName('submit-clear-dismissed-suggestions');
     for (var button of clearDismissedButtons) {
       button.addEventListener('click', onClearDismissedButtonClicked);
     }
+
+    var toggleDismissedButtons =
+        document.getElementsByClassName('toggle-dismissed-suggestions');
+    for (var button of toggleDismissedButtons) {
+      button.addEventListener('click', onToggleDismissedButtonClicked);
+    }
   }
 
   function onClearCachedButtonClicked(event) {
     event.preventDefault();
     var id = parseInt(event.currentTarget.getAttribute('category-id'), 10);
     chrome.send('clearCachedSuggestions', [id]);
   }
 
   function onClearDismissedButtonClicked(event) {
     event.preventDefault();
     var id = parseInt(event.currentTarget.getAttribute('category-id'), 10);
     chrome.send('clearDismissedSuggestions', [id]);
   }
 
+  function onToggleDismissedButtonClicked(event) {
+    event.preventDefault();
+    var id = parseInt(event.currentTarget.getAttribute('category-id'), 10);
+    var table = $('dismissed-suggestions-' + id);
+    table.classList.toggle('hidden');
+    chrome.send('toggleDismissedSuggestions',
+        [id, !table.classList.contains('hidden')]);
+  }
+
   function receiveJson(json) {
     var trimmed = json.trim();
     var hasContent = (trimmed && trimmed != '{}');
 
     if (hasContent) {
       receiveProperty('last-json-text', trimmed);
       $('last-json').classList.remove('hidden');
     } else {
       $('last-json').classList.add('hidden');
     }
@@ skipping 47 matching lines @@
     setHostRestricted: setHostRestricted,
     receiveProperty: receiveProperty,
     receiveHosts: receiveHosts,
     receiveContentSuggestions: receiveContentSuggestions,
     receiveJson: receiveJson,
   };
 });
 
 document.addEventListener('DOMContentLoaded',
                           chrome.SnippetsInternals.initialize);