Make miscellaneous_bindings.js not depend on onLoad().

chrome/renderer/resources/extensions/extension_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 extension API.
 
 var extensionNatives = requireNative('extension');
 var GetExtensionViews = extensionNatives.GetExtensionViews;
 var OpenChannelToExtension = extensionNatives.OpenChannelToExtension;
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 
+var inIncognitoContext = requireNative('process').InIncognitoContext();
+
+chrome.extension = chrome.extension || {};
+
+var manifestVersion = requireNative('process').GetManifestVersion();
+if (manifestVersion < 2) {
+  chrome.self = chrome.extension;
+  chrome.extension.inIncognitoTab = inIncognitoContext;
+}
+
+chrome.extension.inIncognitoContext = inIncognitoContext;
+
 // This should match chrome.windows.WINDOW_ID_NONE.
 //
 // We can't use chrome.windows.WINDOW_ID_NONE directly because the
 // chrome.windows API won't exist unless this extension has permission for it;
 // which may not be the case.
 var WINDOW_ID_NONE = -1;
 
 chromeHidden.registerCustomHook('extension',
                                 function(bindingsAPI, extensionId) {
   var apiFunctions = bindingsAPI.apiFunctions;
@@ skipping 101 matching lines @@
     var name = '';
     if (connectInfo && connectInfo.name)
       name = connectInfo.name;
 
     var portId = OpenChannelToExtension(extensionId, targetId, name);
     if (portId >= 0)
       return chromeHidden.Port.createPort(portId, name);
     throw new Error('Error connecting to extension ' + targetId);
   });
 });