Revert of [ios] Move WebStateList to ios/chrome/browser/web_state_list.

ios/chrome/browser/web_state_list/web_state_list_serialization.h

Index: ios/chrome/browser/web_state_list/web_state_list_serialization.h
diff --git a/ios/chrome/browser/web_state_list/web_state_list_serialization.h b/ios/chrome/browser/web_state_list/web_state_list_serialization.h
deleted file mode 100644
index a6d18fecc0cb48422e4a90af604e5753041d114e..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/web_state_list/web_state_list_serialization.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2017 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_CHROME_BROWSER_WEB_STATE_LIST_WEB_STATE_LIST_SERIALIZATION_H_
-#define IOS_CHROME_BROWSER_WEB_STATE_LIST_WEB_STATE_LIST_SERIALIZATION_H_
-
-#import <Foundation/Foundation.h>
-
-#include <memory>
-
-#include "base/callback_forward.h"
-
-@class CRWSessionStorage;
-class WebStateList;
-
-namespace web {
-class WebState;
-}
-
-// Factory for creating WebStates.
-using WebStateFactory =
-    base::RepeatingCallback<std::unique_ptr<web::WebState>(CRWSessionStorage*)>;
-
-// Returns an array of serialised sessions.
-NSArray<CRWSessionStorage*>* SerializeWebStateList(
-    WebStateList* web_state_list);
-
-// Restores |sessions| into |web_state_list| using |web_state_factory| for
-// creating the restored WebStates.
-void DeserializeWebStateList(WebStateList* web_state_list,
-                             NSArray<CRWSessionStorage*>* sessions,
-                             const WebStateFactory& web_state_factory);
-
-#endif  // IOS_CHROME_BROWSER_WEB_STATE_LIST_WEB_STATE_LIST_SERIALIZATION_H_