Move all components/offline_pages/ files into component/offline_pages/core

components/offline_pages/core/downloads/offline_page_download_notifier.h

 // 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.
 
-#ifndef COMPONENTS_OFFLINE_PAGES_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_NOTIFIER_H_
-#define COMPONENTS_OFFLINE_PAGES_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_NOTIFIER_H_
+#ifndef COMPONENTS_OFFLINE_PAGES_CORE_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_NOTIFIER_H_
+#define COMPONENTS_OFFLINE_PAGES_CORE_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_NOTIFIER_H_
 
-#include "components/offline_pages/downloads/download_ui_item.h"
+#include "components/offline_pages/core/downloads/download_ui_item.h"
 
 namespace offline_pages {
 
 struct OfflinePageDownloadNotifier {
  public:
   virtual ~OfflinePageDownloadNotifier() = default;
 
   // Reports that |item| has completed successfully.
   virtual void NotifyDownloadSuccessful(const DownloadUIItem& item) = 0;
 
   // Reports that |item| has completed unsuccessfully.
   virtual void NotifyDownloadFailed(const DownloadUIItem& item) = 0;
 
   // Reports that |item| is active and possibly making progress.
   virtual void NotifyDownloadProgress(const DownloadUIItem& item) = 0;
 
   // Reports that |item| has been paused (and so it is not active).
   virtual void NotifyDownloadPaused(const DownloadUIItem& item) = 0;
 
   // Reports that any progress on |item| has been interrupted. It is pending
   // or available for another attempt when conditions allows.
   virtual void NotifyDownloadInterrupted(const DownloadUIItem& item) = 0;
 
   // Reports that |item| has been canceled.
   virtual void NotifyDownloadCanceled(const DownloadUIItem& item) = 0;
 };
 
 }  // namespace offline_pages
 
-#endif  // COMPONENTS_OFFLINE_PAGES_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_NOTIFIER_H_
+#endif  // COMPONENTS_OFFLINE_PAGES_CORE_DOWNLOADS_OFFLINE_PAGE_DOWNLOAD_NOTIFIER_H_