[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/open_tabs_ui_delegate.h

Index: components/sync_sessions/open_tabs_ui_delegate.h
diff --git a/components/sync_sessions/open_tabs_ui_delegate.h b/components/sync_sessions/open_tabs_ui_delegate.h
index 911b83e9da2e17268543159b560b495ee450d747..cf8fd5faee4d2ee2b5c97fb7ef16f2d9676a1dc3 100644
--- a/components/sync_sessions/open_tabs_ui_delegate.h
+++ b/components/sync_sessions/open_tabs_ui_delegate.h
@@ -14,7 +14,7 @@
 #include "components/sessions/core/session_types.h"
 #include "components/sync_sessions/synced_session.h"
 
-namespace sync_driver {
+namespace sync_sessions {
 
 class OpenTabsUIDelegate {
  public:
@@ -64,6 +64,6 @@ class OpenTabsUIDelegate {
   virtual ~OpenTabsUIDelegate();
 };
 
-}  // namespace sync_driver
+}  // namespace sync_sessions
 
 #endif  // COMPONENTS_SYNC_SESSIONS_OPEN_TABS_UI_DELEGATE_H_