Move maximize/fullscreen/restore to shell

ui/aura_shell/show_state_controller.h

Index: ui/aura_shell/show_state_controller.h
diff --git a/ui/aura_shell/show_state_controller.h b/ui/aura_shell/show_state_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..cd5fbea94ee866b16948cc9984ba849e39ecbd5f
--- /dev/null
+++ b/ui/aura_shell/show_state_controller.h
@@ -0,0 +1,44 @@
+// 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_SHOW_STATE_CONTROLLER_H_
+#define UI_AURA_SHELL_SHOW_STATE_CONTROLLER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "ui/aura/window_observer.h"
+
+namespace aura {
+class Window;
+}
+
+namespace aura_shell {
+namespace internal {
+
+class DefaultContainerLayoutManager;
+
+// ShowStateController controls the window's bounds when
+// the window's show state property has changed.
+class ShowStateController : public aura::WindowObserver {
+public:
+  explicit ShowStateController(DefaultContainerLayoutManager* layout_manager);
+  virtual ~ShowStateController();
+
+  // Invoked when window proparty has changed.
+  virtual void OnPropertyChanged(aura::Window* window,
+                                 const char* name,
+                                 void* old) OVERRIDE;
+
+ private:
+  // LayoutManager that downs this ShowStateController.
+  DefaultContainerLayoutManager* layout_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShowStateController);
+};
+
+}  // namepsace aura_shell
+}  // namepsace internal
+
+#endif  // UI_AURA_SHELL_SHOW_STATE_CONTROLLER_H_