[Sync] Fix namespace for sync_driver component

components/sync_driver/sync_frontend.h

Index: components/sync_driver/sync_frontend.h
diff --git a/components/sync_driver/sync_frontend.h b/components/sync_driver/sync_frontend.h
index 0a360a8fd7ef9003c95f7fd422cc56400d5939d4..b8d7f606cbad1b0c216104d51a657741b18bde75 100644
--- a/components/sync_driver/sync_frontend.h
+++ b/components/sync_driver/sync_frontend.h
@@ -25,7 +25,7 @@ namespace sync_pb {
 class EncryptedData;
 }  // namespace sync_pb
 
-namespace browser_sync {
+namespace sync_driver {
 
 // SyncFrontend is the interface used by SyncBackendHost to communicate with
 // the entity that created it and, presumably, is interested in sync-related
@@ -139,6 +139,6 @@ class SyncFrontend {
   virtual void OnActionableError(const syncer::SyncProtocolError& error) = 0;
 };
 
-}  // namespace browser_sync
+}  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_FRONTEND_H_