[Clean Skeleton] Migrate code to clean/

ios/chrome/browser/web/web_mediator.mm

-// 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.       =
-// ============================================================================
-
-#import "ios/chrome/browser/web/web_mediator+internal.h"
-#import "ios/chrome/browser/web/web_mediator.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-@interface WebMediator ()
-@property(nonatomic, readwrite, assign) web::WebState* webState;
-@property(nonatomic, readwrite, strong) NSMutableDictionary* injectors;
-@end
-
-@implementation WebMediator
-@synthesize webState = _webState;
-@synthesize injectors = _injectors;
-
-- (instancetype)initWithWebState:(web::WebState*)webState {
-  if (self = [super init]) {
-    _webState = webState;
-    _injectors = [[NSMutableDictionary alloc] init];
-  }
-  return self;
-}
-
-@end