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

ios/chrome/browser/tabs/tab_model_closing_web_state_observer.mm

 // 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.
 
 #import "ios/chrome/browser/tabs/tab_model_closing_web_state_observer.h"
 
 #include "base/logging.h"
 #include "base/strings/string_piece.h"
 #include "components/sessions/core/tab_restore_service.h"
 #include "components/sessions/ios/ios_live_tab.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #import "ios/chrome/browser/tabs/legacy_tab_helper.h"
 #import "ios/chrome/browser/tabs/tab.h"
 #import "ios/chrome/browser/tabs/tab_model.h"
 #import "ios/chrome/browser/tabs/tab_private.h"
-#import "ios/chrome/browser/web_state_list/web_state_list.h"
+#import "ios/shared/chrome/browser/tabs/web_state_list.h"
 #import "ios/web/public/navigation_item.h"
 #import "ios/web/public/navigation_manager.h"
 #import "ios/web/public/web_state/web_state.h"
 #include "url/gurl.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 @implementation TabModelClosingWebStateObserver {
@@ skipping 53 matching lines @@
     const base::StringPiece host = item->GetVirtualURL().host_piece();
     if (host == kChromeUINewTabHost || host == kChromeUIBookmarksHost)
       return;
   }
 
   _restoreService->CreateHistoricalTab(
       sessions::IOSLiveTab::GetForWebState(webState), atIndex);
 }
 
 @end