Revert of Remove shell::Loader

services/shell/loader.h

Index: services/shell/loader.h
diff --git a/services/shell/loader.h b/services/shell/loader.h
new file mode 100644
index 0000000000000000000000000000000000000000..c99b628333bf3917c6d22dbef332a22e8c5ea024
--- /dev/null
+++ b/services/shell/loader.h
@@ -0,0 +1,26 @@
+// Copyright 2014 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 SERVICES_SHELL_LOADER_H_
+#define SERVICES_SHELL_LOADER_H_
+
+#include "base/callback.h"
+#include "mojo/public/cpp/system/core.h"
+#include "services/shell/public/interfaces/connector.mojom.h"
+#include "services/shell/public/interfaces/shell_client.mojom.h"
+
+namespace shell {
+
+// Interface to implement special loading behavior for a particular name.
+class Loader {
+ public:
+  virtual ~Loader() {}
+
+  virtual void Load(const std::string& name,
+                    mojom::ShellClientRequest request) = 0;
+};
+
+}  // namespace shell
+
+#endif  // SERVICES_SHELL_LOADER_H_