Revert of [Sync] Move //components/sync to the syncer namespace. (patchset #5 id:40001 of https://co

components/sync/driver/protocol_event_observer.h

Index: components/sync/driver/protocol_event_observer.h
diff --git a/components/sync/driver/protocol_event_observer.h b/components/sync/driver/protocol_event_observer.h
index 651069aca08e21140341b4a958022cbe8005f685..56e48284e6ffed93337d9d8af18582f121c19c35 100644
--- a/components/sync/driver/protocol_event_observer.h
+++ b/components/sync/driver/protocol_event_observer.h
@@ -6,17 +6,19 @@
 #define COMPONENTS_SYNC_DRIVER_PROTOCOL_EVENT_OBSERVER_H_
 
 namespace syncer {
-
 class ProtocolEvent;
+}
+
+namespace browser_sync {
 
 class ProtocolEventObserver {
  public:
   ProtocolEventObserver();
   virtual ~ProtocolEventObserver();
 
-  virtual void OnProtocolEvent(const ProtocolEvent& event) = 0;
+  virtual void OnProtocolEvent(const syncer::ProtocolEvent& event) = 0;
 };
 
-}  // namespace syncer
+}  // namespace browser_sync
 
 #endif  // COMPONENTS_SYNC_DRIVER_PROTOCOL_EVENT_OBSERVER_H_