Show the Mac app launcher window with a spinner while loading Chrome.

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"
@@ skipping 27 matching lines @@
   base::scoped_nsobject<AppsSearchResultsController>
       appsSearchResultsController_;
   base::scoped_nsobject<SigninViewController> signinViewController_;
 
   // Subview for drawing the background. Hidden when the signin view is visible.
   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>
       app_list_model_observer_bridge_;
   BOOL showingSearchResults_;
 }
 
 @property(readonly, nonatomic) AppsSearchBoxController*
     searchBoxController;
 
 - (app_list::AppListViewDelegate*)delegate;
 - (void)setDelegate:(scoped_ptr<app_list::AppListViewDelegate>)newDelegate;
 - (void)onProfilesChanged;
 
 @end
 
 @interface AppListViewController (TestingAPI)
 
 @property(nonatomic, readonly) BOOL showingSearchResults;
 
 - (AppsGridController*)appsGridController;
 - (NSSegmentedControl*)pagerControl;
 - (NSView*)backgroundView;
 
 @end
 
 #endif  // UI_APP_LIST_COCOA_APP_LIST_VIEW_CONTROLLER_H_