Remove need to sign in to use the App Launcher.

ui/app_list/cocoa/app_list_view_controller.h

Index: ui/app_list/cocoa/app_list_view_controller.h
diff --git a/ui/app_list/cocoa/app_list_view_controller.h b/ui/app_list/cocoa/app_list_view_controller.h
index 21f33559285e7e2c12eff034113e6eb7dd5a8023..83030e037976525d0527ed12a6284c3f07fe95de 100644
--- a/ui/app_list/cocoa/app_list_view_controller.h
+++ b/ui/app_list/cocoa/app_list_view_controller.h
@@ -22,7 +22,6 @@ class AppListModelObserverBridge;
 
 @class AppListPagerView;
 @class AppsGridController;
-@class SigninViewController;
 
 // Controller for the top-level view of the app list UI. It creates and hosts an
 // AppsGridController (displaying an AppListModel), pager control to navigate
@@ -37,9 +36,8 @@ APP_LIST_EXPORT
   base::scoped_nsobject<AppsSearchBoxController> appsSearchBoxController_;
   base::scoped_nsobject<AppsSearchResultsController>
       appsSearchResultsController_;
-  base::scoped_nsobject<SigninViewController> signinViewController_;
 
-  // Subview for drawing the background. Hidden when the signin view is visible.
+  // Subview for drawing the background.
   base::scoped_nsobject<NSView> backgroundView_;
 
   // Subview of |backgroundView_| that slides out when search results are shown.