[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/synced_session.h

Index: components/sync_sessions/synced_session.h
diff --git a/components/sync_sessions/synced_session.h b/components/sync_sessions/synced_session.h
index c13f7d4dde14c09e4b142e296753fe938d0b35f7..f1a00a4684aba00b75aa0ee57d2ece04ddfc4b58 100644
--- a/components/sync_sessions/synced_session.h
+++ b/components/sync_sessions/synced_session.h
@@ -19,7 +19,7 @@ namespace sessions {
 struct SessionWindow;
 }
 
-namespace sync_driver {
+namespace sync_sessions {
 
 // Defines a synced session for use by session sync. A synced session is a
 // list of windows along with a unique session identifer (tag) and meta-data
@@ -103,6 +103,6 @@ struct SyncedSession {
   DISALLOW_COPY_AND_ASSIGN(SyncedSession);
 };
 
-}  // namespace sync_driver
+}  // namespace sync_sessions
 
 #endif  // COMPONENTS_SYNC_SESSIONS_SYNCED_SESSION_H_