Implement Invalidator::Acknowledge

sync/notifier/fake_invalidation_state_tracker.h

Index: sync/notifier/fake_invalidation_state_tracker.h
diff --git a/sync/notifier/fake_invalidation_state_tracker.h b/sync/notifier/fake_invalidation_state_tracker.h
index aea358df9960a29189645d12b83ef90c8c3f4aec..94cb32740bc238825d7386036e3ffb10b482f077 100644
--- a/sync/notifier/fake_invalidation_state_tracker.h
+++ b/sync/notifier/fake_invalidation_state_tracker.h
@@ -22,17 +22,23 @@ class FakeInvalidationStateTracker
   int64 GetMaxVersion(const invalidation::ObjectId& id) const;
 
   // InvalidationStateTracker implementation.
-  virtual InvalidationVersionMap GetAllMaxVersions() const OVERRIDE;
+  virtual InvalidationStateMap GetStateMap() const OVERRIDE;
   virtual void SetMaxVersion(const invalidation::ObjectId& id,
                              int64 max_version) OVERRIDE;
   virtual void Forget(const ObjectIdSet& ids) OVERRIDE;
   virtual void SetBootstrapData(const std::string& data) OVERRIDE;
   virtual std::string GetBootstrapData() const OVERRIDE;
+  virtual void GenerateAckHandles(
+      const ObjectIdSet& ids,
+      const scoped_refptr<base::TaskRunner>& task_runner,
+      base::Callback<void(const AckHandleMap&)> callback) OVERRIDE;
+  virtual void Acknowledge(const invalidation::ObjectId& id,
+                           const AckHandle& ack_handle) OVERRIDE;
 
   static const int64 kMinVersion;
 
  private:
-  InvalidationVersionMap versions_;
+  InvalidationStateMap state_map_;
   std::string bootstrap_data_;
 };