Plumb listenerIDs correctly for events that clobber chrome.Event.prototype.dispatch.

chrome/renderer/resources/extensions/omnibox_custom_bindings.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.
 
 // Custom bindings for the omnibox API. Only injected into the v8 contexts
 // for extensions which have permission for the omnibox API.
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 var sendRequest = require('sendRequest').sendRequest;
 
@@ skipping 79 matching lines @@
       'sendSuggestions', function(requestId, userSuggestions) {
     var suggestions = [];
     for (var i = 0; i < userSuggestions.length; i++) {
       var parseResult = parseOmniboxDescription(
           userSuggestions[i].description);
       parseResult.content = userSuggestions[i].content;
       suggestions.push(parseResult);
     }
     return [requestId, suggestions];
   });
+});
 
-  chrome.omnibox.onInputChanged.dispatch =
-      function(text, requestId) {
-    var suggestCallback = function(suggestions) {
-      chrome.omnibox.sendSuggestions(requestId, suggestions);
-    };
-    chrome.Event.prototype.dispatch.apply(this, [text, suggestCallback]);
+chromeHidden.Event.registerArgumentMassager('omnibox.onInputChanged',
+    function(args, dispatch) {
+  var text = args[0];
+  var requestId = args[1];
+  var suggestCallback = function(suggestions) {
+    chrome.omnibox.sendSuggestions(requestId, suggestions);
   };
+  dispatch([text, suggestCallback]);
 });