Add a flag to control whether there is a shortcut for the app list / launcher in the Windows taskba…

chrome/browser/ui/app_list/app_list_controller.h

Index: chrome/browser/ui/app_list/app_list_controller.h
diff --git a/chrome/browser/ui/app_list/app_list_controller.h b/chrome/browser/ui/app_list/app_list_controller.h
index f7e16a6be94be298c0ade504fa010dbf2f102c65..aa10ecc3d6a30109260ab648e0da1124366a38c3 100644
--- a/chrome/browser/ui/app_list/app_list_controller.h
+++ b/chrome/browser/ui/app_list/app_list_controller.h
@@ -56,6 +56,13 @@ namespace app_list_controller {
 // Show the app list.
 void ShowAppList();
 
+// Check that the presence of the app list shortcut matches the flag
+// kShowAppListShortcut. This will either create or delete a shortcut
+// file in the user data directory.
+// TODO(benwells): Remove this and the flag once the app list installation
+// is implemented.
+void CheckAppListTaskbarShortcut();
+
 }  // namespace app_list_controller
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_CONTROLLER_H_