Purge the App Launcher code from Mac

ui/app_list/cocoa/apps_search_box_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_APPS_SEARCH_BOX_CONTROLLER_H_
-#define UI_APP_LIST_COCOA_APPS_SEARCH_BOX_CONTROLLER_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include <memory>
-
-#include "base/mac/scoped_nsobject.h"
-#include "ui/app_list/app_list_export.h"
-
-namespace app_list {
-class AppListMenu;
-class AppListModel;
-class AppListViewDelegate;
-class SearchBoxModel;
-class SearchBoxModelObserverBridge;
-}
-
-@class AppListMenuController;
-@class HoverImageMenuButton;
-@class SearchTextField;
-
-@protocol AppsSearchBoxDelegate<NSTextFieldDelegate>
-
-- (app_list::AppListViewDelegate*)appListDelegate;
-- (app_list::SearchBoxModel*)searchBoxModel;
-- (app_list::AppListModel*)appListModel;
-- (void)modelTextDidChange;
-
-@end
-
-// Controller for the search box in the topmost portion of the app list.
-APP_LIST_EXPORT
-@interface AppsSearchBoxController : NSViewController<NSTextFieldDelegate> {
- @private
-  base::scoped_nsobject<SearchTextField> searchTextField_;
-  base::scoped_nsobject<NSImageView> searchImageView_;
-  base::scoped_nsobject<HoverImageMenuButton> menuButton_;
-  base::scoped_nsobject<AppListMenuController> menuController_;
-  std::unique_ptr<app_list::SearchBoxModelObserverBridge> bridge_;
-  std::unique_ptr<app_list::AppListMenu> appListMenu_;
-
-  id<AppsSearchBoxDelegate> delegate_;  // Weak. Owns us.
-}
-
-@property(assign, nonatomic) id<AppsSearchBoxDelegate> delegate;
-
-- (id)initWithFrame:(NSRect)frame;
-- (void)clearSearch;
-
-// Rebuild the menu due to changes from the AppListViewDelegate.
-- (void)rebuildMenu;
-
-@end
-
-@interface AppsSearchBoxController (TestingAPI)
-
-- (NSTextField*)searchTextField;
-- (NSPopUpButton*)menuControl;
-- (app_list::AppListMenu*)appListMenu;
-
-@end
-
-#endif  // UI_APP_LIST_COCOA_APPS_SEARCH_BOX_CONTROLLER_H_