Introduce App Launcher for Windows.

chrome/browser/ui/app_list/app_list_controller.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_H_
 #define CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_H_
 
 #include <string>
 
+namespace gfx {
+class ImageSkia;
+}
+
 class Profile;
 
 // Interface to allow the view delegate to call out to whatever is controlling
 // the app list. This will have different implementations for different
 // platforms.
 class AppListController {
  public:
   virtual ~AppListController() {}
 
   // Handle the controller being closed.
   virtual void CloseView() = 0;
 
   // Control of pinning apps.
   virtual bool IsAppPinned(const std::string& extension_id) = 0;
   virtual void PinApp(const std::string& extension_id) = 0;
   virtual void UnpinApp(const std::string& extension_id) = 0;
   virtual bool CanPin() = 0;
 
   // App has been clicked on in the app list.
   virtual void ActivateApp(Profile* profile,
                            const std::string& extension_id,
                            int event_flags) = 0;
+
+  // Get the window icon to show, if any.
+  virtual gfx::ImageSkia GetWindowAppIcon() = 0;
 };
 
+namespace app_list_controller {
+
+// Show the app list.
+void ShowAppList();
+
+}
+
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_H_