Find reading list entry state in model from url

ios/chrome/browser/reading_list/reading_list_model.h

Index: ios/chrome/browser/reading_list/reading_list_model.h
diff --git a/ios/chrome/browser/reading_list/reading_list_model.h b/ios/chrome/browser/reading_list/reading_list_model.h
index 9dc2d38240121d75af757cbab94eedcd46297039..5806d7286c27395f3f4c7fb06759bfc4c2d09267 100644
--- a/ios/chrome/browser/reading_list/reading_list_model.h
+++ b/ios/chrome/browser/reading_list/reading_list_model.h
@@ -28,6 +28,11 @@ class ChromeBrowserState;
 class ReadingListModel {
  public:
   class ScopedReadingListBatchUpdate;
+
+  // The entry is either NOTPRESENT in the model, in the READ part or in the
+  // UNREAD part of the model.
+  enum EntryState { NOTPRESENT, READ, UNREAD };

[Olivier, 2016/09/23 14:54:54]

NOT_PRESENT?

[gambard, 2016/09/26 14:02:30]

Done.

+
   // Returns true if the model finished loading. Until this returns true the
   // reading list is not ready for use.
   virtual bool loaded() const = 0;
@@ -80,6 +85,9 @@ class ReadingListModel {
   // already. This may trigger deletion of old read entries.
   virtual void MarkReadByURL(const GURL& url) = 0;
 
+  // Return the state of the entry in the model (not present, read or unread).
+  virtual EntryState EntryPositionByURL(const GURL& url) = 0;

[Olivier, 2016/09/23 14:54:54]

position is more an index IMO.

[gambard, 2016/09/26 14:02:30]

Done.

+
   // Methods to mutate an entry. Will locate the relevant entry by URL. Does
   // nothing if the entry is not found.
   virtual void SetEntryTitle(const GURL& url, const std::string& title) = 0;