Make launching apps from shelf more intuitive

chrome/browser/ui/ash/launcher/chrome_launcher_controller.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 CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 102 matching lines @@
   // Closes or unpins the shelf item.
   void CloseLauncherItem(const ash::ShelfID& id);
 
   // Returns true if the item identified by |id| is pinned.
   bool IsPinned(const ash::ShelfID& id);
 
   // Set the shelf item status for the V1 application with the given |app_id|.
   // Adds or removes an item as needed to respect the running and pinned state.
   void SetV1AppStatus(const std::string& app_id, ash::ShelfItemStatus status);
 
-  // Requests that the shelf item controller specified by |id| open a new
-  // instance of the app.  |event_flags| holds the flags of the event which
-  // triggered this command.
-  void Launch(const ash::ShelfID& id, int event_flags);
-
   // Closes the specified item.
   void Close(const ash::ShelfID& id);
 
   // Returns true if the specified item is open.
   bool IsOpen(const ash::ShelfID& id);
 
   // Returns true if the specified item is for a platform app.
   bool IsPlatformApp(const ash::ShelfID& id);
 
   // Opens a new instance of the application identified by the ShelfID.
-  // Used by the app-list, and by pinned-app shelf items.
+  // Used by the app-list, and by pinned-app shelf items. |display_id| is id of
+  // the display from which the app is launched.
   void LaunchApp(const ash::ShelfID& id,
                  ash::ShelfLaunchSource source,
-                 int event_flags);
+                 int event_flags,
+                 int64_t display_id);
 
   // If |app_id| is running, reactivates the app's most recently active window,
   // otherwise launches and activates the app.
   // Used by the app-list, and by pinned-app shelf items.
   void ActivateApp(const std::string& app_id,
                    ash::ShelfLaunchSource source,
                    int event_flags);
 
   // Set the image for a specific shelf item (e.g. when set by the app).
   void SetLauncherItemImage(const ash::ShelfID& shelf_id,
@@ skipping 289 matching lines @@
   using RunningAppListIds = std::vector<std::string>;
   using RunningAppListIdMap = std::map<std::string, RunningAppListIds>;
   RunningAppListIdMap last_used_running_application_order_;
 
   base::WeakPtrFactory<ChromeLauncherController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_