Teach mojo_shell how to load http URLs

mojo/loader/job.h

+// 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.
+
+#ifndef MOJO_LOADER_JOB_H_
+#define MOJO_LOADER_JOB_H_
+
+#include "url/gurl.h"
+
+namespace mojo {
+namespace loader {
+
+class Job {

[Aaron Boodman, 2013/10/18 17:59:42]

I think a class-header comment is warranted here explaining what a Job is
conceptually.

+ public:
+  class Delegate {
+   public:
+    virtual void DidCompleteLoad(const GURL& app_url) = 0;
+
+   protected:
+    virtual ~Delegate();
+  };
+
+  // You can cancel a job by deleting it.
+  virtual ~Job();
+
+ protected:
+  // You can create a job using Loader.
+  Job();
+
+  DISALLOW_COPY_AND_ASSIGN(Job);
+};
+
+}  // namespace loader
+}  // namespace mojo
+
+#endif  // MOJO_LOADER_JOB_H_