Remove need to sign in to use the App Launcher.

ui/app_list/cocoa/app_list_view_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 UI_APP_LIST_COCOA_APP_LIST_VIEW_CONTROLLER_H_
 #define UI_APP_LIST_COCOA_APP_LIST_VIEW_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/app_list/app_list_export.h"
 #import "ui/app_list/cocoa/apps_pagination_model_observer.h"
 #import "ui/app_list/cocoa/apps_search_box_controller.h"
 #import "ui/app_list/cocoa/apps_search_results_controller.h"
 
 namespace app_list {
 class AppListViewDelegate;
 class AppListModel;
 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
 // between pages in the grid, and search entry box with a pop up menu.
 APP_LIST_EXPORT
 @interface AppListViewController : NSViewController<AppsPaginationModelObserver,
                                                     AppsSearchBoxDelegate,
                                                     AppsSearchResultsDelegate> {
  @private
   base::scoped_nsobject<AppsGridController> appsGridController_;
   base::scoped_nsobject<AppListPagerView> pagerControl_;
   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.
   base::scoped_nsobject<NSView> contentsView_;
 
   // Progress indicator that is visible while the delegate is NULL.
   base::scoped_nsobject<NSProgressIndicator> loadingIndicator_;
 
   scoped_ptr<app_list::AppListViewDelegate> delegate_;
   scoped_ptr<app_list::AppListModelObserverBridge>
@@ skipping 14 matching lines @@
 
 @property(nonatomic, readonly) BOOL showingSearchResults;
 
 - (AppsGridController*)appsGridController;
 - (NSSegmentedControl*)pagerControl;
 - (NSView*)backgroundView;
 
 @end
 
 #endif  // UI_APP_LIST_COCOA_APP_LIST_VIEW_CONTROLLER_H_