[Clean Skeleton] Migrate code to clean/

ios/chrome/browser/ui/tab_grid/tab_grid_view_controller.h

-// Copyright 2016 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.
-
-// ======                        New Architecture                         =====
-// =         This code is only used in the new iOS Chrome architecture.       =
-// ============================================================================
-
-#ifndef IOS_CHROME_BROWSER_UI_TAB_GRID_TAB_GRID_VIEW_CONTROLLER_H_
-#define IOS_CHROME_BROWSER_UI_TAB_GRID_TAB_GRID_VIEW_CONTROLLER_H_
-
-#import <UIKit/UIKit.h>
-
-#import "ios/chrome/browser/ui/animators/zoom_transition_delegate.h"
-
-@protocol SettingsCommands;
-@protocol TabCommands;
-@protocol TabGridCommands;
-
-// The data source for tab grid UI.
-// Conceptually the tab grid represents a group of WebState objects (which
-// are ultimately the model-layer representation of a browser tab). The data
-// source must be able to map between indices and WebStates.
-@protocol TabGridDataSource<NSObject>
-
-// The number of tabs to be displayed in the grid.
-- (NSUInteger)numberOfTabsInTabGrid;
-
-// Title for the tab at |index| in the grid.
-- (NSString*)titleAtIndex:(NSInteger)index;
-
-@end
-
-// Controller for a scrolling view displaying square cells that represent
-// the user's open tabs.
-@interface TabGridViewController : UIViewController<ZoomTransitionDelegate>
-
-// Data source for the tabs to be displayed.
-@property(nonatomic, weak) id<TabGridDataSource> dataSource;
-// Command handlers.
-@property(nonatomic, weak) id<SettingsCommands> settingsCommandHandler;
-@property(nonatomic, weak) id<TabCommands> tabCommandHandler;
-@property(nonatomic, weak) id<TabGridCommands> tabGridCommandHandler;
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_TAB_GRID_TAB_GRID_VIEW_CONTROLLER_H_