[Sync] Add support for sync Persistence Errors

chrome/browser/themes/theme_syncable_service.cc

Index: chrome/browser/themes/theme_syncable_service.cc
diff --git a/chrome/browser/themes/theme_syncable_service.cc b/chrome/browser/themes/theme_syncable_service.cc
index bf414d64b0e9df6507b4a01ab1d5a36bbe0c4553..3389443e055fc321051edd8da9810b22d886243e 100644
--- a/chrome/browser/themes/theme_syncable_service.cc
+++ b/chrome/browser/themes/theme_syncable_service.cc
@@ -135,6 +135,7 @@ syncer::SyncError ThemeSyncableService::ProcessSyncChanges(
 
   if (!sync_processor_.get()) {
     return syncer::SyncError(FROM_HERE,
+                             syncer::SyncError::DATATYPE_ERROR,
                              "Theme syncable service is not started.",
                              syncer::THEMES);
   }
@@ -180,8 +181,8 @@ syncer::SyncError ThemeSyncableService::ProcessSyncChanges(
   }
 
   return syncer::SyncError(FROM_HERE,
-                           base::StringPrintf(
-                               "Didn't find valid theme specifics."),
+                           syncer::SyncError::DATATYPE_ERROR,
+                           "Didn't find valid theme specifics",
                            syncer::THEMES);
 }