No need to route via ATOM_INTERNAL_MESSAGE

atom/browser/api/lib/web-contents.coffee

@@ -9,8 +9,8 @@ module.exports.wrap = (webContents) ->
   webContents.__proto__ = EventEmitter.prototype
 
   # WebContents::send(channel, args..)
-  webContents.send = (args...) ->
-    @_send 'ATOM_INTERNAL_MESSAGE', [args...]
+  webContents.send = (channel, args...) ->
+    @_send channel, [args...]
 
   # Make sure webContents.executeJavaScript would run the code only when the
   # web contents has been loaded.

atom/renderer/api/lib/ipc.coffee

@@ -4,9 +4,6 @@ v8Util  = process.atomBinding 'v8_util'
 # Created by init.coffee.
 ipc = v8Util.getHiddenValue global, 'ipc'
 
-ipc.on 'ATOM_INTERNAL_MESSAGE', (args...) ->
-  @emit args...
-
 ipc.send = (args...) ->
   binding.send 'ipc-message', [args...]