Make miscellaneous_bindings and event_bindings Required as needed. Previously

chrome/renderer/resources/extensions/input.ime_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 binding for the input ime API. Only injected into the
 // v8 contexts for extensions which have permission for the API.
 
 var binding = require('binding').Binding.create('input.ime');
 
+var Event = require('event_bindings').Event;
+
 binding.registerCustomHook(function(api) {
   var input_ime = api.compiledApi;
 
   input_ime.onKeyEvent.dispatchToListener = function(callback, args) {
     var engineID = args[0];
     var keyData = args[1];
 
     var result = false;
     try {
-      result = chrome.Event.prototype.dispatchToListener(callback, args);
+      result = Event.prototype.dispatchToListener(callback, args);
     } catch (e) {
       console.error('Error in event handler for onKeyEvent: ' + e.stack);
     }
     if (!input_ime.onKeyEvent.async)
       input_ime.keyEventHandled(keyData.requestId, result);
   };
 
   input_ime.onKeyEvent.addListener = function(cb, opt_extraInfo) {
     input_ime.onKeyEvent.async = false;
     if (opt_extraInfo instanceof Array) {
       for (var i = 0; i < opt_extraInfo.length; ++i) {
         if (opt_extraInfo[i] == "async") {
           input_ime.onKeyEvent.async = true;
         }
       }
     }
-    chrome.Event.prototype.addListener.call(this, cb, null);
+    Event.prototype.addListener.call(this, cb, null);
   };
 });
 
 exports.binding = binding.generate();