Make launching apps from shelf more intuitive

chrome/browser/ui/app_list/app_list_controller_delegate.h

 // Copyright 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_DELEGATE_H_
 #define CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_DELEGATE_H_
 
 #include <string>
 
 #include "chrome/common/extensions/extension_constants.h"
@@ skipping 81 matching lines @@
                        const GURL& url,
                        ui::PageTransition transition,
                        WindowOpenDisposition disposition) = 0;
 
   // Show the app's most recent window, or launch it if it is not running.
   virtual void ActivateApp(Profile* profile,
                            const extensions::Extension* extension,
                            AppListSource source,
                            int event_flags) = 0;
 
-  // Launch the app.
+  // Launch the app on the display identified by |display_id|.
   virtual void LaunchApp(Profile* profile,
                          const extensions::Extension* extension,
                          AppListSource source,
-                         int event_flags) = 0;
+                         int event_flags,
+                         int64_t display_id) = 0;
 
   static std::string AppListSourceToString(AppListSource source);
 
   // True if the user has permission to modify the given app's settings.
   bool UserMayModifySettings(Profile* profile, const std::string& app_id);
 
   // Uninstall the app identified by |app_id| from |profile|.
   void UninstallApp(Profile* profile, const std::string& app_id);
 
   // True if the app was installed from the web store.
@@ skipping 28 matching lines @@
   extensions::InstallTracker* GetInstallTrackerFor(Profile* profile);
 
   // Get the list of installed apps for the given profile.
   void GetApps(Profile* profile, extensions::ExtensionSet* out_apps);
 
   // Called when a search is started using the app list search box.
   void OnSearchStarted();
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_DELEGATE_H_