Add Store+Sync to reading list.

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 625b19f5f2b503e458bb5f8b9603978f31ea8c02..5c9fda0a8d410e85cbd17723b7bd7361bb2eac7c 100644
--- a/ios/chrome/browser/reading_list/reading_list_model.h
+++ b/ios/chrome/browser/reading_list/reading_list_model.h
@@ -16,11 +16,16 @@
 
 class GURL;
 class ReadingListModel;
+class ReadingListStore;
 
 namespace ios {
 class ChromeBrowserState;
 }
 
+namespace syncer {
+class ModelTypeService;
+}
+
 // The reading list model contains two list of entries: one of unread urls, the
 // other of read ones. This object should only be accessed from one thread
 // (Usually the main thread). The observers callbacks are also sent on the main
@@ -35,6 +40,8 @@ class ReadingListModel {
   // Returns true if the model is performing batch updates right now.
   bool IsPerformingBatchUpdates() const;
 
+  virtual syncer::ModelTypeService* GetModelTypeService() = 0;
+
   // Tells model to prepare for batch updates.
   // This method is reentrant, i.e. several batch updates may take place at the
   // same time.
@@ -61,6 +68,10 @@ class ReadingListModel {
   // Returns a specific entry. Returns null if the entry does not exist.
   virtual const ReadingListEntry* GetEntryFromURL(const GURL& gurl) const = 0;
 
+  virtual void SyncAddEntry(std::unique_ptr<ReadingListEntry> entry,
+                            bool read) = 0;
+  virtual void SyncRemoveEntry(const GURL& gurl) = 0;
+
   // Synchronously calls the |callback| with entry associated with this |url|.
   // Does nothing if there is no entry associated.
   // Returns whether the callback has been called.
@@ -68,6 +79,15 @@ class ReadingListModel {
       const GURL& url,
       base::Callback<void(const ReadingListEntry&)> callback) const = 0;
 
+  // Synchronously calls the |callback| with entry associated with this |url|
+  // and its |read| status.
+  // Does nothing if there is no entry associated.
+  // Returns whether the callback has been called.
+  virtual bool CallbackEntryReadStatusURL(
+      const GURL& url,
+      base::Callback<void(const ReadingListEntry&, bool read)> callback)
+      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 addition may be
   // asynchronous, and the data will be available only once the observers are
@@ -127,6 +147,12 @@ class ReadingListModel {
   // ReadingListBatchUpdateToken dtor.
   virtual void EndBatchUpdates();
 
+  // Called when model is entering batch update mode.
+  virtual void EnteringBatchUpdates();
+
+  // Called when model is leaving batch update mode.
+  virtual void LeavingBatchUpdates();
+
  private:
   unsigned int current_batch_updates_count_;