Teach mojo_shell how to load http URLs

mojo/shell/task_runners.cc

+// Copyright (c) 2013 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 "base/message_loop/message_loop_proxy.h"
+#include "base/threading/thread.h"
+#include "mojo/shell/task_runners.h"
+
+namespace mojo {
+namespace shell {
+
+TaskRunners::TaskRunners(base::SingleThreadTaskRunner* ui_runner)
+    : ui_runner_(ui_runner),
+      io_thread_(new base::Thread("io_thread")) {
+  base::Thread::Options options;
+  options.message_loop_type = base::MessageLoop::TYPE_IO;
+  io_thread_->StartWithOptions(options);
+}
+
+TaskRunners::~TaskRunners() {
+}
+
+}  // namespace shell
+}  // namespace mojo