Send configuration stats together at the end of data type configuration so that

chrome/browser/sync/glue/data_type_manager_impl.h

Index: chrome/browser/sync/glue/data_type_manager_impl.h
diff --git a/chrome/browser/sync/glue/data_type_manager_impl.h b/chrome/browser/sync/glue/data_type_manager_impl.h
index 762e34edb35db1764db252f97384935395638322..84e3a67d7446c2d16da3e7d45a0ec2b0c625ad91 100644
--- a/chrome/browser/sync/glue/data_type_manager_impl.h
+++ b/chrome/browser/sync/glue/data_type_manager_impl.h
@@ -19,6 +19,7 @@
 #include "chrome/browser/sync/glue/model_association_manager.h"
 
 namespace syncer {
+struct DataTypeConfigurationStats;
 class DataTypeDebugInfoListener;
 template <typename T> class WeakHandle;
 }
@@ -183,6 +184,9 @@ class DataTypeManagerImpl : public DataTypeManager,
   // datatype encryption.
   const browser_sync::DataTypeEncryptionHandler* encryption_handler_;
 
+  // Association and time stats of data type configuration.
+  std::vector<syncer::DataTypeConfigurationStats> configuration_stats_;
+
   DISALLOW_COPY_AND_ASSIGN(DataTypeManagerImpl);
 };