Add basic support for launching mash shelf pinned apps.

chrome/browser/ui/ash/launcher/chrome_mash_shelf_controller.h

 // Copyright 2016 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_ASH_LAUNCHER_CHROME_MASH_SHELF_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_MASH_SHELF_CONTROLLER_H_
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "chrome/browser/ui/app_icon_loader.h"
+#include "chrome/browser/ui/ash/launcher/launcher_controller_helper.h"
 #include "mash/shelf/public/interfaces/shelf.mojom.h"
 #include "mojo/public/cpp/bindings/associated_binding.h"
 
 class ChromeShelfItemDelegate;
 
 // ChromeMashShelfController manages chrome's interaction with the mash shelf.
 class ChromeMashShelfController : public mash::shelf::mojom::ShelfObserver,
                                   public AppIconLoaderDelegate {
  public:
   ~ChromeMashShelfController() override;
 
   // Creates an instance.
   static ChromeMashShelfController* CreateInstance();
 
   // Returns the single ChromeMashShelfController instance.
   static ChromeMashShelfController* instance() { return instance_; }
 
+  void LaunchItem(const std::string& app_id);
+
  private:
   ChromeMashShelfController();
 
   void Init();
 
   void PinAppsFromPrefs();
 
   AppIconLoader* GetAppIconLoaderForApp(const std::string& app_id);
 
   // mash::shelf::mojom::ShelfObserver:
   void OnAlignmentChanged(mash::shelf::mojom::Alignment alignment) override;
   void OnAutoHideBehaviorChanged(
       mash::shelf::mojom::AutoHideBehavior auto_hide) override;
 
   // AppIconLoaderDelegate:
   void OnAppImageUpdated(const std::string& app_id,
                          const gfx::ImageSkia& image) override;
 
   static ChromeMashShelfController* instance_;
 
+  LauncherControllerHelper helper_;
   mash::shelf::mojom::ShelfControllerPtr shelf_controller_;
   mojo::AssociatedBinding<mash::shelf::mojom::ShelfObserver> observer_binding_;
   std::map<std::string, std::unique_ptr<ChromeShelfItemDelegate>>
       app_id_to_item_delegate_;
 
   // Used to load the images for app items.
   std::vector<std::unique_ptr<AppIconLoader>> app_icon_loaders_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeMashShelfController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_MASH_SHELF_CONTROLLER_H_