Showing previews UI for Offline Previews

components/offline_pages/loaded_offline_page_info.h

Index: components/offline_pages/loaded_offline_page_info.h
diff --git a/components/offline_pages/loaded_offline_page_info.h b/components/offline_pages/loaded_offline_page_info.h
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+++ b/components/offline_pages/loaded_offline_page_info.h
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+// 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_LOADED_OFFLINE_PAGE_INFO_H_
+#define COMPONENTS_OFFLINE_PAGES_LOADED_OFFLINE_PAGE_INFO_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/supports_user_data.h"
+
+namespace net {
+class URLRequest;
+}
+
+namespace offline_pages {
+
+struct OfflinePageItem;
+struct OfflinePageHeader;
+
+// Contains the info about the offline page being loaded.
+class LoadedOfflinePageInfo : public base::SupportsUserData::Data {
+ public:
+  LoadedOfflinePageInfo();
+  ~LoadedOfflinePageInfo() override;
+
+  std::unique_ptr<LoadedOfflinePageInfo> DeepCopy();
+
+  // static
+  static void CreateInfoForRequest(
+      net::URLRequest* request,
+      std::unique_ptr<OfflinePageItem> offline_page,
+      std::unique_ptr<OfflinePageHeader> offline_header,
+      bool is_offline_preview);
+
+  // static
+  static LoadedOfflinePageInfo* GetInfo(const net::URLRequest& request);
+
+  OfflinePageItem* offline_page() { return offline_page_.get(); }
+
+  OfflinePageHeader* offline_header() { return offline_header_.get(); }
+
+  bool is_offline_preview() { return is_offline_preview_; }
+
+ private:
+  // The cached copy of OfflinePageItem.
+  std::unique_ptr<OfflinePageItem> offline_page_;
+
+  // The offline header that is provided when offline page is loaded.
+  std::unique_ptr<OfflinePageHeader> offline_header_;
+
+  // Whether the offline page was navigated to as a preview. Previews are shown
+  // when the user is on a prohibitively slow network.
+  bool is_offline_preview_;
+
+  DISALLOW_COPY_AND_ASSIGN(LoadedOfflinePageInfo);
+};
+
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_LOADED_OFFLINE_PAGE_INFO_H_