Refactor LauncherItemController and LauncherItemDelegate

ash/shell/launcher_item_delegate_impl.h

+// Copyright 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 ASH_SHELL_LAUNCHER_ITEM_DELEGATE_IMPL_
+#define ASH_SHELL_LAUNCHER_ITEM_DELEGATE_IMPL_
+
+#include "ash/launcher/launcher_item_delegate.h"
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+
+namespace ash {
+namespace shell {
+
+class WindowWatcher;
+
+// Implementation of ash::LauncherItemDelegate.

[sky, 2013/09/11 01:42:57]

This needs a better description.

[simonhong_, 2013/09/11 09:05:26]

Done.

+class LauncherItemDelegateImpl : public ash::LauncherItemDelegate {
+ public:
+  LauncherItemDelegateImpl(ash::LauncherID id,
+                           ash::shell::WindowWatcher* watcher);
+  virtual ~LauncherItemDelegateImpl();
+
+  // ash::LauncherItemDelegate overrides:
+  virtual void ItemSelected(const ui::Event& event) OVERRIDE;
+  virtual base::string16 GetTitle() OVERRIDE;
+  virtual ui::MenuModel* CreateContextMenu(
+      aura::RootWindow* root_window) OVERRIDE;
+  virtual ash::LauncherMenuModel* CreateApplicationMenu(
+      int event_flags) OVERRIDE;
+  virtual bool IsDraggable() OVERRIDE;
+  virtual bool ShouldShowTooltip() OVERRIDE;
+
+ private:
+  ash::LauncherID id_;
+  ash::shell::WindowWatcher* watcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(LauncherItemDelegateImpl);
+};
+
+}  // namespace shell
+}  // namespace ash
+
+#endif  // ASH_SHELL_LAUNCHER_ITEM_DELEGATE_IMPL_