[Sync] Fix namespaces for the browser_sync component.

components/browser_sync/signin_confirmation_helper.h

Index: components/browser_sync/signin_confirmation_helper.h
diff --git a/components/browser_sync/signin_confirmation_helper.h b/components/browser_sync/signin_confirmation_helper.h
index 8e6eac5cf1a3845384a2db7c7544a1fc29927796..27bd62ef1bf02c1a293f0cc464c5509c8a173267 100644
--- a/components/browser_sync/signin_confirmation_helper.h
+++ b/components/browser_sync/signin_confirmation_helper.h
@@ -16,7 +16,7 @@ class HistoryService;
 class QueryResults;
 }
 
-namespace sync_driver {
+namespace browser_sync {
 
 // Helper class for sync signin to check some asynchronous conditions. Call
 // either CheckHasHistory or CheckHasTypedUrls or both, and |return_result|
@@ -65,6 +65,6 @@ class SigninConfirmationHelper {
   DISALLOW_COPY_AND_ASSIGN(SigninConfirmationHelper);
 };
 
-}  // namespace sync_driver
+}  // namespace browser_sync
 
 #endif  // COMPONENTS_BROWSER_SYNC_SIGNIN_CONFIRMATION_HELPER_H_