[Clean Skeleton] Migrate code to clean/

ios/chrome/browser/web/web_mediator.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_WEB_WEB_MEDIATOR_H_
-#define IOS_CHROME_BROWSER_WEB_WEB_MEDIATOR_H_
-
-#import <Foundation/Foundation.h>
-
-namespace web {
-class WebState;
-}
-
-// An object to provide extensible access to a webState.
-// Feature implementations that add functionality to a webState by injecting
-// javascript should do so in categories on WebMediator that implement protocols
-// for use by components interfacing with the feature and by webState clients
-// (for example, view controllers displaying webState's view).
-// Category implementations should make use of web_mediator+internals.h to
-// access internal APIs for this class.
-@interface WebMediator : NSObject
-
-- (instancetype)initWithWebState:(web::WebState*)webState
-    NS_DESIGNATED_INITIALIZER;
-
-- (instancetype)init NS_UNAVAILABLE;
-
-@property(nonatomic, readonly) web::WebState* webState;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_WEB_WEB_MEDIATOR_H_