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 28a8fe7a03f76c727c799647e2145091e759bf94..3b9bc28a9383248624ac7c5ca3e85dada6cadc83 100644
--- a/ios/chrome/browser/reading_list/reading_list_model.h
+++ b/ios/chrome/browser/reading_list/reading_list_model.h
@@ -11,23 +11,32 @@
 
 #include "base/callback.h"
 #include "base/observer_list.h"
+#include "base/threading/non_thread_safe.h"
 #include "ios/chrome/browser/reading_list/reading_list_entry.h"
 #include "ios/chrome/browser/reading_list/reading_list_model_observer.h"
 
 class GURL;
+class ReadingListEntry;
 class ReadingListModel;
+class ReadingListStore;
+class ScopedReadingListBatchUpdate;
 
 namespace ios {
 class ChromeBrowserState;
 }
 
+namespace syncer {
+class ModelTypeSyncBridge;
+}
+
 // 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
 // thread.
-class ReadingListModel {
+class ReadingListModel : public base::NonThreadSafe {
  public:
   class ScopedReadingListBatchUpdate;
+
   // Returns true if the model finished loading. Until this returns true the
   // reading list is not ready for use.
   virtual bool loaded() const = 0;
@@ -35,6 +44,9 @@ class ReadingListModel {
   // Returns true if the model is performing batch updates right now.
   bool IsPerformingBatchUpdates() const;
 
+  // Returns the ModelTypeSyncBridge responsible for handling sync message.
+  virtual syncer::ModelTypeSyncBridge* GetModelTypeSyncBridge() = 0;
+
   // Tells model to prepare for batch updates.
   // This method is reentrant, i.e. several batch updates may take place at the
   // same time.
@@ -43,6 +55,9 @@ class ReadingListModel {
   // the batch update has completed.
   std::unique_ptr<ScopedReadingListBatchUpdate> BeginBatchUpdates();
 
+  // Creates a batch token that will freeze the model while in scope.
+  virtual std::unique_ptr<ScopedReadingListBatchUpdate> CreateBatchToken();
+
   // Returns the size of read and unread entries.
   virtual size_t unread_size() const = 0;
   virtual size_t read_size() const = 0;
@@ -59,7 +74,10 @@ class ReadingListModel {
   virtual const ReadingListEntry& GetReadEntryAtIndex(size_t index) const = 0;
 
   // Returns a specific entry. Returns null if the entry does not exist.
-  virtual const ReadingListEntry* GetEntryFromURL(const GURL& gurl) const = 0;
+  // If |read| is not null and the entry is found, |*read| is the read status
+  // of the entry.
+  virtual const ReadingListEntry* GetEntryFromURL(const GURL& gurl,
+                                                  bool* read) const = 0;
 
   // Synchronously calls the |callback| with entry associated with this |url|.
   // Does nothing if there is no entry associated.
@@ -109,7 +127,7 @@ class ReadingListModel {
     explicit ScopedReadingListBatchUpdate(ReadingListModel* model)
         : model_(model) {}
 
-    ~ScopedReadingListBatchUpdate() { model_->EndBatchUpdates(); }
+    virtual ~ScopedReadingListBatchUpdate();
 
    private:
     ReadingListModel* model_;
@@ -128,6 +146,12 @@ 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_;