[Extensions] Begin making Extension port initialization asynchronous

extensions/renderer/resources/runtime_custom_bindings.js

 // Copyright 2014 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 runtime API.
 
 var binding = require('binding').Binding.create('runtime');
 
 var messaging = require('messaging');
 var runtimeNatives = requireNative('runtime');
+var messagingNatives = requireNative('messaging_natives');
 var process = requireNative('process');
 var utils = require('utils');
 
 var WINDOW = {};
 try {
   WINDOW = window;
 } catch (e) {
   // Running in SW context.
   // TODO(lazyboy): Synchronous access to background page is not possible from
   // service worker context. Decide what we should do in this case for the class
@@ skipping 126 matching lines @@
       targetId = id;
     }
 
     var name = '';
     if (connectInfo && connectInfo.name)
       name = connectInfo.name;
 
     var includeTlsChannelId =
       !!(connectInfo && connectInfo.includeTlsChannelId);
 
-    var portId = runtimeNatives.OpenChannelToExtension(targetId, name,
-                                                       includeTlsChannelId);
+    var portId = messagingNatives.OpenChannelToExtension(targetId, name,
+                                                         includeTlsChannelId);
     if (portId >= 0)
       return messaging.createPort(portId, name);
   });
 
   //
   // Privileged APIs.
   //
   if (contextType != 'BLESSED_EXTENSION')
     return;
 
   apiFunctions.setHandleRequest('connectNative',
                                 function(nativeAppName) {
-    var portId = runtimeNatives.OpenChannelToNativeApp(nativeAppName);
+    var portId = messagingNatives.OpenChannelToNativeApp(nativeAppName);
     if (portId >= 0)
       return messaging.createPort(portId, '');
     throw new Error('Error connecting to native app: ' + nativeAppName);
   });
 
   apiFunctions.setCustomCallback('getBackgroundPage',
                                  function(name, request, callback, response) {
     if (callback) {
       var bg =
           runtimeNatives.GetExtensionViews(-1, -1, 'BACKGROUND')[0] || null;
       callback(bg);
     }
   });
 
   bindDirectoryEntryCallback('getPackageDirectoryEntry', apiFunctions);
 });
 
 exports.$set('bindDirectoryEntryCallback', bindDirectoryEntryCallback);
 exports.$set('binding', binding.generate());