Refactor LauncherDelegate

ash/launcher/launcher_delegate_proxy.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_LAUNCHER_LAUNCHER_DELEGATE_PROXY_H_
+#define ASH_LAUNCHER_LAUNCHER_DELEGATE_PROXY_H_
+
+#include "ash/launcher/launcher_delegate.h"
+#include "base/compiler_specific.h"
+
+namespace ash {
+class LauncherItemDelegate;
+
+namespace internal {
+class AppListLauncherItemDelegate;
+
+// LauncherDelegateProxy helps Launcher/LauncherView to choose right
+// LauncherItemDelegate of LauncherItem.
+class LauncherDelegateProxy : public ash::LauncherDelegate {

[sky, 2013/08/23 20:23:14]

I think what you need is a class that lets you register LauncherItemDelegates
with. The AppListLauncherItemDelegate would be registered with it and the new
manager would register with it too. I'm fine with this class doing that, but I
think calling it LauncherDelegateProxy is a bit misleading. Long term we should
have only one delegate and getting the LauncherItemDelegate should not be on it.
We should just have a way to register the ItemDelegate. Maybe a better name is
LauncherItemDelegateManager.

[simonhong_, 2013/08/26 08:47:10]

Done.

+ public:
+  LauncherDelegateProxy();
+  virtual ~LauncherDelegateProxy();
+
+  // LauncherDelegate overrides:
+  virtual ash::LauncherID GetIDByWindow(aura::Window* window) OVERRIDE;
+  virtual void OnLauncherCreated(Launcher* launcher) OVERRIDE;
+  virtual void OnLauncherDestroyed(Launcher* launcher) OVERRIDE;
+  virtual LauncherID GetLauncherIDForAppID(const std::string& app_id) OVERRIDE;
+  virtual void PinAppWithID(const std::string& app_id) OVERRIDE;
+  virtual bool IsAppPinned(const std::string& app_id) OVERRIDE;
+  virtual void UnpinAppsWithID(const std::string& app_id) OVERRIDE;
+  virtual LauncherItemDelegate* GetLauncherItemDelegate(
+      const LauncherItem& item) OVERRIDE;
+
+ private:
+  scoped_ptr<LauncherDelegate> chrome_launcher_delegate_;

[sky, 2013/08/23 20:23:14]

This shouldn't be named chrome.

[simonhong_, 2013/08/26 08:47:10]

Removed.

+  scoped_ptr<AppListLauncherItemDelegate> app_list_launcher_item_delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(LauncherDelegateProxy);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_LAUNCHER_LAUNCHER_DELEGATE_PROXY_H_