Introduce mash/shell

mash/shell/shell_application_delegate.h

Index: mash/shell/shell_application_delegate.h
diff --git a/mash/shell/shell_application_delegate.h b/mash/shell/shell_application_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..471f4a1ec07b6ae0330015bc680742869a933e6b
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+++ b/mash/shell/shell_application_delegate.h
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+// Copyright 2015 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 MASH_SHELL_SHELL_APPLICATION_DELEGATE_H_
+#define MASH_SHELL_SHELL_APPLICATION_DELEGATE_H_
+
+#include <map>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "mojo/application/public/cpp/application_delegate.h"
+
+namespace mojo {
+class ApplicationConnection;
+}
+
+namespace mash {
+namespace shell {
+
+class ShellApplicationDelegate : public mojo::ApplicationDelegate {
+ public:
+  ShellApplicationDelegate();
+  ~ShellApplicationDelegate() override;
+
+ private:
+  // mojo::ApplicationDelegate:
+  void Initialize(mojo::ApplicationImpl* app) override;
+  bool ConfigureIncomingConnection(
+      mojo::ApplicationConnection* connection) override;
+
+  void StartWindowManager();
+  void StartSystemUI();
+
+  // Starts the application at |url|, running |restart_callback| if the
+  // connection to the application is closed.
+  void StartRestartableService(const std::string& url,
+                               const base::Closure& restart_callback);
+
+  mojo::ApplicationImpl* app_;
+  std::map<std::string, scoped_ptr<mojo::ApplicationConnection>> connections_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShellApplicationDelegate);
+};
+
+}  // namespace shell
+}  // namespace mash
+
+#endif  // MASH_SHELL_SHELL_APPLICATION_DELEGATE_H_