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

components/offline_pages/background/request_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_BACKGROUND_REQUEST_NOTIFIER_H_
-#define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_NOTIFIER_H_
-
-namespace offline_pages {
-
-class SavePageRequest;
-
-class RequestNotifier {
- public:
-  // Status to return for failed notifications.
-  // NOTE: for any changes to the enum, please also update related switch code
-  // in RequestCoordinatorEventLogger.
-  // GENERATED_JAVA_ENUM_PACKAGE:org.chromium.components.offlinepages
-  enum class BackgroundSavePageResult {
-    SUCCESS,
-    PRERENDER_FAILURE,
-    PRERENDER_CANCELED,
-    FOREGROUND_CANCELED,
-    SAVE_FAILED,
-    EXPIRED,
-    RETRY_COUNT_EXCEEDED,
-    START_COUNT_EXCEEDED,
-    REMOVED,
-  };
-
-  virtual ~RequestNotifier() = default;
-
-  // Notifies observers that |request| has been added.
-  virtual void NotifyAdded(const SavePageRequest& request) = 0;
-
-  // Notifies observers that |request| has been completed with |status|.
-  virtual void NotifyCompleted(const SavePageRequest& request,
-                               BackgroundSavePageResult status) = 0;
-
-  // Notifies observers that |request| has been changed.
-  virtual void NotifyChanged(const SavePageRequest& request) = 0;
-};
-
-}  // namespace offline_pages
-
-#endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_NOTIFIER_H_