[Offline Pages] Delete associated page along with bookmark.

chrome/browser/android/offline_pages/offline_page_bookmark_observer.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 CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BOOKMARK_OBSERVER_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BOOKMARK_OBSERVER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/android/offline_pages/offline_page_model_factory.h"
+#include "components/bookmarks/browser/base_bookmark_model_observer.h"
+#include "components/offline_pages/offline_page_types.h"
+
+class GURL;
+
+namespace bookmarks {
+class BookmarkModel;
+class BookmarkNode;
+}
+
+namespace content {
+class BrowserContext;
+}
+
+namespace offline_pages {
+
+class OfflinePageBookmarkObserver
+    : public bookmarks::BaseBookmarkModelObserver {
+ public:
+  explicit OfflinePageBookmarkObserver(content::BrowserContext* context);
+  ~OfflinePageBookmarkObserver() override;
+
+  // Implement bookmarks::OfflinePageBookmarkObserver
+  void BookmarkModelChanged() override;
+  void BookmarkNodeRemoved(bookmarks::BookmarkModel* model,
+                           const bookmarks::BookmarkNode* parent,
+                           int old_index,
+                           const bookmarks::BookmarkNode* node,
+                           const std::set<GURL>& removed_urls) override;
+
+ private:
+  // Does work for actual expiring.
+  void DoExpireRemovedBookmarkPages(const MultipleOfflineIdResult& offline_ids);
+
+  // Callback for expiring removed bookmark pages.
+  void OnExpireRemovedBookmarkPagesDone(bool result);
+
+  content::BrowserContext* context_;
+
+  OfflinePageModel* offline_page_model_;
+
+  base::WeakPtrFactory<OfflinePageBookmarkObserver> weak_ptr_factory_;
+};
+}  // namespace offline_pages
+
+#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_OFFLINE_PAGE_BOOKMARK_OBSERVER_H_