Add OVERRIDE to chrome/browser/sync/.

chrome/browser/sync/engine/build_and_process_conflict_sets_command.h

Index: chrome/browser/sync/engine/build_and_process_conflict_sets_command.h
diff --git a/chrome/browser/sync/engine/build_and_process_conflict_sets_command.h b/chrome/browser/sync/engine/build_and_process_conflict_sets_command.h
index 1fb04ee2098e8ce43769dc2ae72f64feee9bd10d..a446e7e63cf257f10f1489e4d00e5fb0284bf5cf 100644
--- a/chrome/browser/sync/engine/build_and_process_conflict_sets_command.h
+++ b/chrome/browser/sync/engine/build_and_process_conflict_sets_command.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/compiler_specific.h"
 #include "chrome/browser/sync/engine/model_changing_syncer_command.h"
 #include "chrome/browser/sync/engine/model_safe_worker.h"
 
@@ -35,7 +36,8 @@ class BuildAndProcessConflictSetsCommand : public ModelChangingSyncerCommand {
   virtual ~BuildAndProcessConflictSetsCommand();
 
   // ModelChangingSyncerCommand implementation.
-  virtual void ModelChangingExecuteImpl(sessions::SyncSession* session);
+  virtual void ModelChangingExecuteImpl(
+      sessions::SyncSession* session) OVERRIDE;
 
  private:
   bool BuildAndProcessConflictSets(sessions::SyncSession* session);