[Extensions] Begin making Extension port initialization asynchronous

extensions/renderer/resources/runtime_custom_bindings.js

Index: extensions/renderer/resources/runtime_custom_bindings.js
diff --git a/extensions/renderer/resources/runtime_custom_bindings.js b/extensions/renderer/resources/runtime_custom_bindings.js
index 1efdadcea9b8f65362d9f75caaf293ae0f5b1e53..fb461061cd5d73e56b5e09ff7513eb7c8b01880b 100644
--- a/extensions/renderer/resources/runtime_custom_bindings.js
+++ b/extensions/renderer/resources/runtime_custom_bindings.js
@@ -8,6 +8,7 @@ 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');
 
@@ -154,8 +155,8 @@ binding.registerCustomHook(function(binding, id, contextType) {
     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);
   });
@@ -168,7 +169,7 @@ binding.registerCustomHook(function(binding, id, contextType) {
 
   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);