[Sync] Move //components/sync to the syncer namespace.

components/sync/driver/sync_error_controller.cc

Index: components/sync/driver/sync_error_controller.cc
diff --git a/components/sync/driver/sync_error_controller.cc b/components/sync/driver/sync_error_controller.cc
index 2badb4eeed00c60de6472064b6b970c7a506e4a3..f3a94ec53fb4178b27fd419c448cb4e609ea2545 100644
--- a/components/sync/driver/sync_error_controller.cc
+++ b/components/sync/driver/sync_error_controller.cc
@@ -6,7 +6,9 @@
 
 #include "components/sync/driver/sync_service.h"
 
-SyncErrorController::SyncErrorController(sync_driver::SyncService* service)
+namespace syncer {
+
+SyncErrorController::SyncErrorController(SyncService* service)
     : service_(service) {
   DCHECK(service_);
 }
@@ -29,3 +31,5 @@ void SyncErrorController::RemoveObserver(Observer* observer) {
 void SyncErrorController::OnStateChanged() {
   FOR_EACH_OBSERVER(Observer, observer_list_, OnErrorChanged());
 }
+
+}  // namespace syncer