Reading List: Open distilled article first if no network.

components/reading_list/ios/reading_list_model.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_READING_LIST_IOS_READING_LIST_MODEL_H_
 #define COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 60 matching lines @@
 
   // Returns true if there are entries in the model that were not seen by the
   // user yet. Reset to true when new unread entries are added. Reset to false
   // when ResetUnseenEntries is called.
   virtual bool HasUnseenEntries() const = 0;
   virtual void ResetUnseenEntries() = 0;
 
   // Returns a specific entry. Returns null if the entry does not exist.
   virtual const ReadingListEntry* GetEntryByURL(const GURL& gurl) const = 0;
 
+  // Returns the first unread entry. If |distilled| is true, prioritize the
+  // entries available offline.
+  virtual const ReadingListEntry* GetFirstUnreadEntry(bool distilled) const = 0;
+
   // Adds |url| at the top of the unread entries, and removes entries with the
   // same |url| from everywhere else if they exist. The entry title will be a
   // trimmed copy of |title.
   // The addition may be asynchronous, and the data will be available only once
   // the observers are notified.
   virtual const ReadingListEntry& AddEntry(const GURL& url,
                                            const std::string& title) = 0;
 
   // Removes an entry. The removal may be asynchronous, and not happen
   // immediately.
@@ skipping 49 matching lines @@
   // Called when model is leaving batch update mode.
   virtual void LeavingBatchUpdates();
 
  private:
   unsigned int current_batch_updates_count_;
 
   DISALLOW_COPY_AND_ASSIGN(ReadingListModel);
 };
 
 #endif  // COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_H_