Get signals working in the EXTRA_DATA section of MHTML

components/offline_pages/core/offline_page_model.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_MODEL_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_MODEL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 98 matching lines @@
   virtual void AddObserver(Observer* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
 
   static const int64_t kInvalidOfflineId = 0;
 
   // Attempts to save a page offline per |save_page_params|. Requires that the
   // model is loaded.  Generates a new offline id or uses the proposed offline
   // id in |save_page_params| and returns it.
   virtual void SavePage(const SavePageParams& save_page_params,
                         std::unique_ptr<OfflinePageArchiver> archiver,
+                        const std::vector<std::string>& signal_data,
                         const SavePageCallback& callback) = 0;
 
   // Marks that the offline page related to the passed |offline_id| has been
   // accessed. Its access info, including last access time and access count,
   // will be updated. Requires that the model is loaded.
   virtual void MarkPageAccessed(int64_t offline_id) = 0;
 
   // Deletes pages based on |offline_ids|.
   virtual void DeletePagesByOfflineId(const std::vector<int64_t>& offline_ids,
                                       const DeletePageCallback& callback) = 0;
@@ skipping 48 matching lines @@
   // TODO(dougarnett): Remove this and its uses.
   virtual bool is_loaded() const = 0;
 
   // Returns the logger. Ownership is retained by the model.
   virtual OfflineEventLogger* GetLogger() = 0;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_OFFLINE_PAGE_MODEL_H_