Revert 2.5 CLs that relate to pulling Extension port management out of messaging.js.

extensions/renderer/resources/port.js

-// Copyright 2015 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.
-
-var Event = require('event_bindings').Event;
-var messagingNatives = requireNative('messaging_natives');
-var utils = require('utils');
-
-// Port object.  Represents a connection to another script context through
-// which messages can be passed.
-function Port(portId, opt_name) {
-  this.portId_ = portId;
-  this.name = opt_name;
-
-  var portSchema = {name: 'port', $ref: 'runtime.Port'};
-  var messageSchema = {name: 'message', type: 'any', optional: true};
-  var options = {unmanaged: true};
-
-  this.onMessage = new Event(null, [messageSchema, portSchema], options);
-  this.onDisconnect = new Event(null, [portSchema], options);
-  this.onDestroy_ = null;
-}
-
-// Sends a message asynchronously to the context on the other end of this
-// port.
-Port.prototype.postMessage = function(msg) {
-  // JSON.stringify doesn't support a root object which is undefined.
-  if (msg === undefined)
-    msg = null;
-  msg = $JSON.stringify(msg);
-  if (msg === undefined) {
-    // JSON.stringify can fail with unserializable objects. Log an error and
-    // drop the message.
-    //
-    // TODO(kalman/mpcomplete): it would be better to do the same validation
-    // here that we do for runtime.sendMessage (and variants), i.e. throw an
-    // schema validation Error, but just maintain the old behaviour until
-    // there's a good reason not to (http://crbug.com/263077).
-    console.error('Illegal argument to Port.postMessage');
-    return;
-  }
-  messagingNatives.PostMessage(this.portId_, msg);
-};
-
-// Disconnects the port from the other end.
-Port.prototype.disconnect = function() {
-  messagingNatives.CloseChannel(this.portId_, true);
-  this.destroy_();
-};
-
-Port.prototype.destroy_ = function() {
-  if (this.onDestroy_)
-    this.onDestroy_();
-  // Destroy the onMessage/onDisconnect events in case the extension added
-  // listeners, but didn't remove them, when the port closed.
-  privates(this.onMessage).impl.destroy_();
-  privates(this.onDisconnect).impl.destroy_();
-  messagingNatives.PortRelease(this.portId_);
-};
-
-exports.Port = utils.expose('Port', Port, {
-  functions: ['disconnect', 'postMessage'],
-  properties: ['name', 'onMessage', 'onDisconnect']
-});