Move ReadingList model to components/reading_list/core

ios/chrome/browser/reading_list/reading_list_web_state_observer.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.
 
 #include "ios/chrome/browser/reading_list/reading_list_web_state_observer.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
-#include "components/reading_list/ios/reading_list_model.h"
+#include "components/reading_list/core/reading_list_model.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #include "ios/chrome/browser/reading_list/offline_url_utils.h"
 #include "ios/chrome/browser/reading_list/reading_list_model_factory.h"
 #include "ios/web/public/navigation_item.h"
 #include "ios/web/public/navigation_manager.h"
 #include "ios/web/public/reload_type.h"
 #include "ios/web/public/web_state/web_state_user_data.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ skipping 292 matching lines @@
     // on next navigation.
     // Trigger a new navigation on the offline URL.
     web::WebState::OpenURLParams params(url, item->GetReferrer(),
                                         WindowOpenDisposition::CURRENT_TAB,
                                         item->GetTransitionType(), NO);
     web_state()->OpenURL(params);
   }
   reading_list_model_->SetReadStatus(entry->URL(), true);
   UMA_HISTOGRAM_BOOLEAN("ReadingList.OfflineVersionDisplayed", true);
 }