Refactor Reading List Model to use URL as key.

ios/chrome/browser/reading_list/reading_list_store_delegate.h

Index: ios/chrome/browser/reading_list/reading_list_store_delegate.h
diff --git a/ios/chrome/browser/reading_list/reading_list_store_delegate.h b/ios/chrome/browser/reading_list/reading_list_store_delegate.h
index 99170341338f216eec0777676b2fecdc5b44031a..ae58e87f97f6368142cdd2d876becc0a2f841adf 100644
--- a/ios/chrome/browser/reading_list/reading_list_store_delegate.h
+++ b/ios/chrome/browser/reading_list/reading_list_store_delegate.h
@@ -11,21 +11,18 @@ class ReadingListEntry;
 class ReadingListStoreDelegate {
  public:
   // These three mathods handle callbacks from a ReadingListStore.
-  virtual void StoreLoaded(std::unique_ptr<ReadingListEntries> unread,
-                           std::unique_ptr<ReadingListEntries> read) = 0;
+  virtual void StoreLoaded(std::unique_ptr<ReadingListEntries> entries) = 0;
   // Handle sync events.
   // Called to add a new entry to the model.
   // |entry| must not already exist in the model.
-  virtual void SyncAddEntry(std::unique_ptr<ReadingListEntry> entry,
-                            bool read) = 0;
+  virtual void SyncAddEntry(std::unique_ptr<ReadingListEntry> entry) = 0;
 
   // Called to merge a sync entry with a local entry in the model.
   // A local entry with the same URL must exist in the local store and have an
   // older UpdateTime.
   // Return a pointer to the merged entry.
   virtual ReadingListEntry* SyncMergeEntry(
-      std::unique_ptr<ReadingListEntry> entry,
-      bool read) = 0;
+      std::unique_ptr<ReadingListEntry> entry) = 0;
 
   // Called to remove an entry to the model.
   virtual void SyncRemoveEntry(const GURL& url) = 0;