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

components/offline_pages/request_header/offline_page_header.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_REQUEST_HEADER_OFFLINE_PAGE_HEADER_H_
-#define COMPONENTS_OFFLINE_PAGES_REQUEST_HEADER_OFFLINE_PAGE_HEADER_H_
-
-#include <string>
-
-namespace offline_pages {
-
-// Header that defines the custom behavior to load offline pages. Its value is a
-// comma/space separated name-value pair.
-extern const char kOfflinePageHeader[];
-
-// The name used in name-value pair of kOfflinePageHeader to tell if the offline
-// info in this header should be persisted across session restore.
-extern const char kOfflinePageHeaderPersistKey[];
-
-// The name used in name-value pair of kOfflinePageHeader to denote the reason
-// for loading offline page.
-extern const char kOfflinePageHeaderReasonKey[];
-// Possible values in name-value pair that denote the reason for loading offline
-// page.
-// The offline page should be loaded even when the network is connected. This is
-// because the live version failed to load due to certain net error.
-extern const char kOfflinePageHeaderReasonValueDueToNetError[];
-// The offline page should be loaded because the user clicks to open the
-// downloaded page explicitly.
-extern const char kOfflinePageHeaderReasonValueFromDownload[];
-// This only happens after the offline page is loaded due to above reason and
-// then the user reload current page. The network condition should be checked
-// this time to decide if a live version should be tried again.
-extern const char kOfflinePageHeaderReasonValueReload[];
-
-// The name used in name-value pair of kOfflinePageHeader to denote the offline
-// ID of the offline page to load.
-extern const char kOfflinePageHeaderIDKey[];
-
-// Used to parse the extra request header string that defines offline page
-// loading behaviors.
-struct OfflinePageHeader {
- public:
-  enum class Reason {
-    NONE,
-    NET_ERROR,
-    DOWNLOAD,
-    RELOAD
-  };
-
-  OfflinePageHeader();
-
-  // Constructed from a request header value string.
-  // The struct members will be cleared if the parsing failed.
-  explicit OfflinePageHeader(const std::string& header_value);
-
-  ~OfflinePageHeader();
-
-  // Returns the full header string, including both key and value, that could be
-  // passed to set extra request header.
-  std::string GetCompleteHeaderString() const;
-
-  void Clear();
-
-  // Set if failed to parse a request header value string. For testing only.
-  bool did_fail_parsing_for_test;
-
-  // Flag to indicate if the header should be persisted across session restore.
-  bool need_to_persist;
-
-  // Describes the reason to load offline page.
-  Reason reason;
-
-  // The offline ID of the page to load.
-  std::string id;
-};
-
-}  // namespace offline_pages
-
-#endif  // COMPONENTS_OFFLINE_PAGES_REQUEST_HEADER_OFFLINE_PAGE_HEADER_H_