Purge the App Launcher code from Mac

ui/app_list/cocoa/app_list_window_controller.h

Index: ui/app_list/cocoa/app_list_window_controller.h
diff --git a/ui/app_list/cocoa/app_list_window_controller.h b/ui/app_list/cocoa/app_list_window_controller.h
deleted file mode 100644
index 052682fff56e5896089348d490276b6f5f917c8d..0000000000000000000000000000000000000000
--- a/ui/app_list/cocoa/app_list_window_controller.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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_WINDOW_CONTROLLER_H_
-#define UI_APP_LIST_COCOA_APP_LIST_WINDOW_CONTROLLER_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include "base/mac/scoped_nsobject.h"
-#include "ui/app_list/app_list_export.h"
-
-@class AppListViewController;
-
-// Controller for the app list NSWindow.
-APP_LIST_EXPORT
-@interface AppListWindowController : NSWindowController<NSWindowDelegate> {
- @private
-  base::scoped_nsobject<AppListViewController> appListViewController_;
-}
-
-- (AppListViewController*)appListViewController;
-
-@end
-
-#endif  // UI_APP_LIST_COCOA_APP_LIST_WINDOW_CONTROLLER_H_