Teach mojo_shell how to load http URLs

mojo/loader/loader.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.h"
+#include "base/threading/thread.h"
 #include "mojo/loader/loader.h"
 #include "mojo/loader/url_request_context_getter.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 namespace mojo {
 namespace loader {
 
 namespace {
 
 class FetchDelegate : public net::URLFetcherDelegate {
  public:
   explicit FetchDelegate(Loader::Delegate* delegate)
     : delegate_(delegate) {
   }
 
   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
 
  private:
   Loader::Delegate* delegate_;
 };
 
 void FetchDelegate::OnURLFetchComplete(const net::URLFetcher* source) {
   delegate_->DidCompleteLoad(source->GetURL());
   delete this;
 }
 
+scoped_ptr<base::Thread> CreateIOThread(const char* name) {
+  scoped_ptr<base::Thread> thread(new base::Thread(name));
+  base::Thread::Options options;
+  options.message_loop_type = base::MessageLoop::TYPE_IO;
+  thread->StartWithOptions(options);
+  return thread.Pass();
+}
+
 }
 
 class Loader::Data {
 public:
   Data();
   ~Data();
 
+  scoped_ptr<base::Thread> network_thread_;
+  scoped_ptr<base::Thread> cache_thread_;
   scoped_refptr<URLRequestContextGetter> url_request_context_getter;
 };
 
-Loader::Data::Data()
-  : url_request_context_getter(new URLRequestContextGetter()) {
+Loader::Data::Data() {
+  network_thread_ = CreateIOThread("network_thread");
+  cache_thread_ = CreateIOThread("cache_thread");
+
+  url_request_context_getter = new URLRequestContextGetter(
+      network_thread_->message_loop_proxy(),
+      cache_thread_->message_loop_proxy());
 }
 
 Loader::Data::~Data() {
 }
 
 Loader::Loader()
   : data_(new Data()) {
 }
 
 Loader::~Loader() {
 }
 
 void Loader::Load(const GURL& app_url, Delegate* delegate) {
   net::URLFetcher* fetcher = net::URLFetcher::Create(
       app_url, net::URLFetcher::GET, new FetchDelegate(delegate));
 
   fetcher->SetRequestContext(data_->url_request_context_getter.get());
   fetcher->Start();
 }
 
 }  // namespace loader
 }  // namespace mojo