Refactor the socket API to remove onEvent callback in socket.create() function.

chrome/renderer/extensions/experimental.socket_custom_bindings.cc

-// Copyright (c) 2012 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.
-
-#include "chrome/renderer/extensions/experimental.socket_custom_bindings.h"
-
-#include <string>
-
-#include "chrome/common/extensions/extension_action.h"
-#include "chrome/renderer/extensions/extension_dispatcher.h"
-#include "grit/renderer_resources.h"
-#include "v8/include/v8.h"
-
-namespace {
-
-v8::Handle<v8::Value> GetNextSocketEventId(const v8::Arguments& args) {
-  // Note: this works because the socket API only works in the extension
-  // process, not content scripts.
-  static int next_event_id = 1;
-  return v8::Integer::New(next_event_id++);
-}
-
-}  // namespace
-
-namespace extensions {
-
-ExperimentalSocketCustomBindings::ExperimentalSocketCustomBindings()
-    : ChromeV8Extension(NULL) {
-  RouteStaticFunction("GetNextSocketEventId", &GetNextSocketEventId);
-}
-
-}  // extensions