Cleanup mojo_shell and sample_app a bit

mojo/loader/loader.cc

-// Copyright 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 "mojo/loader/loader.h"
-
-#include "base/message_loop/message_loop.h"
-#include "base/threading/thread.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 JobImpl : public net::URLFetcherDelegate, public Job {
- public:
-  JobImpl(const GURL& app_url, Job::Delegate* delegate);
-  virtual ~JobImpl();
-
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
-
-  net::URLFetcher* fetcher() const { return fetcher_.get(); }
-
- private:
-  scoped_ptr<net::URLFetcher> fetcher_;
-  Job::Delegate* delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(JobImpl);
-};
-
-JobImpl::JobImpl(const GURL& app_url, Job::Delegate* delegate)
-    : delegate_(delegate) {
-  fetcher_.reset(net::URLFetcher::Create(app_url, net::URLFetcher::GET, this));
-}
-
-JobImpl::~JobImpl() {
-}
-
-void JobImpl::OnURLFetchComplete(const net::URLFetcher* source) {
-  base::FilePath app_path;
-  source->GetResponseAsFilePath(true, &app_path);
-  delegate_->DidCompleteLoad(source->GetURL(), app_path);
-}
-
-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();
-}
-
-}  // namespace
-
-class Loader::Data {
- public:
-  scoped_refptr<base::SingleThreadTaskRunner> file_runner;
-  scoped_ptr<base::Thread> cache_thread;
-  scoped_refptr<URLRequestContextGetter> url_request_context_getter;
-};
-
-Loader::Loader(base::SingleThreadTaskRunner* network_runner,
-               base::SingleThreadTaskRunner* file_runner,
-               base::FilePath base_path)
-    : data_(new Data()) {
-  data_->file_runner = file_runner;
-  data_->cache_thread = CreateIOThread("cache_thread");
-  data_->url_request_context_getter = new URLRequestContextGetter(
-      base_path, network_runner, data_->cache_thread->message_loop_proxy());
-}
-
-Loader::~Loader() {
-}
-
-scoped_ptr<Job> Loader::Load(const GURL& app_url, Job::Delegate* delegate) {
-  JobImpl* job = new JobImpl(app_url, delegate);
-  job->fetcher()->SetRequestContext(data_->url_request_context_getter.get());
-  job->fetcher()->SaveResponseToTemporaryFile(data_->file_runner.get());
-  job->fetcher()->Start();
-  return make_scoped_ptr(static_cast<Job*>(job));
-}
-
-}  // namespace loader
-}  // namespace mojo