Adding sync support for Passwords

chrome/browser/sync/engine/model_safe_worker.h

Index: chrome/browser/sync/engine/model_safe_worker.h
diff --git a/chrome/browser/sync/engine/model_safe_worker.h b/chrome/browser/sync/engine/model_safe_worker.h
index 7d7461acabd5af29c2e13717f724064046d4ae3f..a89be2881de1ba27af3123f57e13e96e67510d40 100644
--- a/chrome/browser/sync/engine/model_safe_worker.h
+++ b/chrome/browser/sync/engine/model_safe_worker.h
@@ -23,6 +23,9 @@ enum ModelSafeGroup {
   GROUP_DB,            // Models that live on DB thread and are being synced.
   GROUP_HISTORY,       // Models that live on history thread and are being
                        // synced.
+  GROUP_PASSWORD,      // Models that live on the password thread and are
+                       // being synced.  On windows and linux, this runs on the
+                       // DB thread.
   MODEL_SAFE_GROUP_COUNT,
 };