Positions the launcher in the bottom left corner. Adds ShellDelegate

ui/aura_shell/launcher/launcher.h

+// Copyright (c) 2011 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 UI_AURA_SHELL_LAUNCHER_LAUNCHER_H_
+#define UI_AURA_SHELL_LAUNCHER_LAUNCHER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/aura/window_observer.h"
+#include "ui/aura_shell/aura_shell_export.h"
+
+namespace aura {
+class ToplevelWindowContainer;
+}
+
+namespace views {
+class Widget;
+}
+
+namespace aura_shell {
+
+class LauncherModel;
+
+class AURA_SHELL_EXPORT Launcher : public aura::WindowObserver {
+ public:
+  explicit Launcher(aura::ToplevelWindowContainer* window_container);
+  ~Launcher();
+
+  LauncherModel* model() { return model_.get(); }
+  views::Widget* widget() { return widget_; }
+
+ private:
+  // WindowObserver overrides:
+  virtual void OnWindowAdded(aura::Window* new_window) OVERRIDE;
+  virtual void OnWillRemoveWindow(aura::Window* window) OVERRIDE;
+
+  scoped_ptr<LauncherModel> model_;
+
+  // Widget hosting the view.
+  views::Widget* widget_;
+
+  aura::ToplevelWindowContainer* window_container_;
+
+  DISALLOW_COPY_AND_ASSIGN(Launcher);
+};
+
+}  // namespace aura_shell
+
+#endif  // UI_AURA_SHELL_LAUNCHER_LAUNCHER_H_