sync: Define histogram ints for model types

chrome/browser/sync/glue/bookmark_model_associator.cc

Index: chrome/browser/sync/glue/bookmark_model_associator.cc
diff --git a/chrome/browser/sync/glue/bookmark_model_associator.cc b/chrome/browser/sync/glue/bookmark_model_associator.cc
index cec355a4efb86da505a79950210fdfca198c2d77..9b9e7fece9a2775dd003fd1e453342c2905c5c7d 100644
--- a/chrome/browser/sync/glue/bookmark_model_associator.cc
+++ b/chrome/browser/sync/glue/bookmark_model_associator.cc
@@ -706,7 +706,8 @@ void BookmarkModelAssociator::CheckModelSyncState() const {
     if (base::StringToInt64(version_str, &native_version) &&
         native_version != trans.GetModelVersion(syncer::BOOKMARKS)) {
       UMA_HISTOGRAM_ENUMERATION("Sync.LocalModelOutOfSync",
-                                syncer::BOOKMARKS, syncer::MODEL_TYPE_COUNT);
+                                ModelTypeToHistogramInt(syncer::BOOKMARKS),
+                                syncer::MODEL_TYPE_COUNT);
       // Clear version on bookmark model so that we only report error once.
       bookmark_model_->DeleteNodeMetaInfo(bookmark_model_->root_node(),
                                           kBookmarkTransactionVersionKey);