Eliminate ApiResourceEventNotifier.

chrome/browser/extensions/api/socket/socket.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/browser/extensions/api/socket/socket.h"
 
 #include "base/bind.h"
 #include "net/base/address_list.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
 #include "net/socket/socket.h"
 
 namespace extensions {
 
 const char kSocketTypeNotSupported[] = "Socket type does not support this API";
 
 Socket::Socket(const std::string& owner_extension_id)
-    : ApiResource(owner_extension_id, NULL),
-      is_connected_(false) {
+    : ApiResource(owner_extension_id), is_connected_(false) {
 }
 
 Socket::~Socket() {
   // Derived destructors should make sure the socket has been closed.
   DCHECK(!is_connected_);
 }
 
 void Socket::Write(scoped_refptr<net::IOBuffer> io_buffer,
                    int byte_count,
                    const CompletionCallback& callback) {
@@ skipping 108 matching lines @@
                                    const CompletionCallback& callback)
     : io_buffer(io_buffer),
       byte_count(byte_count),
       callback(callback),
       bytes_written(0) {
 }
 
 Socket::WriteRequest::~WriteRequest() { }
 
 }  // namespace extensions