Create a about handler component.

net/url_request/url_request_about_job.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.
-
-// Simple implementation of about: protocol handler that treats everything as
-// about:blank.  No other about: features should be available to web content,
-// so they're not implemented here.
-
-#include "net/url_request/url_request_about_job.h"
-
-#include "base/bind.h"
-#include "base/compiler_specific.h"
-#include "base/location.h"
-#include "base/single_thread_task_runner.h"
-#include "base/thread_task_runner_handle.h"
-
-namespace net {
-
-URLRequestAboutJob::URLRequestAboutJob(URLRequest* request,
-                                       NetworkDelegate* network_delegate)
-    : URLRequestJob(request, network_delegate),
-      weak_factory_(this) {
-}
-
-void URLRequestAboutJob::Start() {
-  // Start reading asynchronously so that all error reporting and data
-  // callbacks happen as they would for network requests.
-  base::ThreadTaskRunnerHandle::Get()->PostTask(
-      FROM_HERE,
-      base::Bind(&URLRequestAboutJob::StartAsync, weak_factory_.GetWeakPtr()));
-}
-
-bool URLRequestAboutJob::GetMimeType(std::string* mime_type) const {
-  *mime_type = "text/html";
-  return true;
-}
-
-URLRequestAboutJob::~URLRequestAboutJob() {
-}
-
-void URLRequestAboutJob::StartAsync() {
-  NotifyHeadersComplete();
-}
-
-}  // namespace net