Revert 158830 - Revert 156678 - Native messaging now uses the MessageService back-end.

chrome/renderer/extensions/extension_custom_bindings.h

Index: chrome/renderer/extensions/extension_custom_bindings.h
===================================================================
--- chrome/renderer/extensions/extension_custom_bindings.h	(revision 158832)
+++ chrome/renderer/extensions/extension_custom_bindings.h	(working copy)
@@ -21,6 +21,9 @@
   // Creates a new messaging channel to the given extension.
   static v8::Handle<v8::Value> OpenChannelToExtension(
       const v8::Arguments& args);
+
+  static v8::Handle<v8::Value> OpenChannelToNativeApp(
+      const v8::Arguments& args);
 };
 
 }  // namespace extensions