[ios] Moved WebUI provider code to ios/web.

ios/public/provider/web/web_ui_ios_controller_factory.h

 // Copyright 2014 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 IOS_PUBLIC_PROVIDER_WEB_WEB_UI_IOS_CONTROLLER_FACTORY_H_
 #define IOS_PUBLIC_PROVIDER_WEB_WEB_UI_IOS_CONTROLLER_FACTORY_H_
 
-#include "ios/public/provider/web/web_ui_ios.h"
-
-class GURL;
-
-namespace web {
-
-class WebUIIOSController;
-
-// Interface for an object that controls which URLs are considered WebUIIOS
-// URLs and creates WebUIIOSController instances for given URLs.
-class WebUIIOSControllerFactory {
- public:
-  virtual ~WebUIIOSControllerFactory() {}
-
-  // Call to register a factory.
-  static void RegisterFactory(WebUIIOSControllerFactory* factory);
-
-  // Returns a WebUIIOSController instance for the given URL, or NULL if the URL
-  // doesn't correspond to a WebUIIOS.
-  virtual WebUIIOSController* CreateWebUIIOSControllerForURL(
-      WebUIIOS* web_ui,
-      const GURL& url) const = 0;
-};
-
-}  // namespace web
+// TODO(crbug.com/524467): Remove this file once downstream code is switched to
+// use correct header.
+#include "ios/web/public/webui/web_ui_ios_controller_factory.h"
 
 #endif  // IOS_PUBLIC_PROVIDER_WEB_WEB_UI_IOS_CONTROLLER_FACTORY_H_