[Offline pages] Add new Error page failure status inside the MHTML archiver and update correspondin…

components/offline_pages/core/offline_page_archiver.h

 // Copyright 2015 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_CORE_OFFLINE_PAGE_ARCHIVER_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ARCHIVER_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 32 matching lines @@
  public:
   // Results of the archive creation.
   enum class ArchiverResult {
     SUCCESSFULLY_CREATED,           // Archive created successfully.
     ERROR_DEVICE_FULL,              // Cannot save the archive - device is full.
     ERROR_CANCELED,                 // Caller canceled the request.
     ERROR_CONTENT_UNAVAILABLE,      // Content to archive is not available.
     ERROR_ARCHIVE_CREATION_FAILED,  // Creation of archive failed.
     ERROR_SECURITY_CERTIFICATE,     // Page was loaded on secure connection, but
                                     // there was a security error.
+    ERROR_PAGE,                     // We detected an error page.

[fgorski, 2017/04/10 21:19:17]

ERROR_WRONG_PAGE_TYPE
(you mention that both error pages and interstitial pages qualify)

[chili, 2017/04/11 20:40:16]

Done.

   };
 
   // Describes the parameters to control how to create an archive.
   struct CreateArchiveParams {
     CreateArchiveParams() : remove_popup_overlay(false) {}
 
     // Whether to remove popup overlay that obstructs viewing normal content.
     bool remove_popup_overlay;
   };
 
@@ skipping 11 matching lines @@
   // |create_archive_params|. Once archive is created |callback| will be called
   // with the result and additional information.
   virtual void CreateArchive(const base::FilePath& archives_dir,
                              const CreateArchiveParams& create_archive_params,
                              const CreateArchiveCallback& callback) = 0;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_ARCHIVER_H_