change newly added OVERRIDE to override in sync/

sync/internal_api/public/attachments/attachment_store_handle.h

Index: sync/internal_api/public/attachments/attachment_store_handle.h
diff --git a/sync/internal_api/public/attachments/attachment_store_handle.h b/sync/internal_api/public/attachments/attachment_store_handle.h
index 28b5f2abdee714035ac70a485575a7f089a5fc04..fae66603d415f22b723bb1fa353480d064e5672b 100644
--- a/sync/internal_api/public/attachments/attachment_store_handle.h
+++ b/sync/internal_api/public/attachments/attachment_store_handle.h
@@ -42,11 +42,11 @@ class SYNC_EXPORT AttachmentStoreHandle : public AttachmentStore,
 
   // AttachmentStore implementation.
   virtual void Read(const AttachmentIdList& id,
-                    const ReadCallback& callback) OVERRIDE;
+                    const ReadCallback& callback) override;
   virtual void Write(const AttachmentList& attachments,
-                     const WriteCallback& callback) OVERRIDE;
+                     const WriteCallback& callback) override;
   virtual void Drop(const AttachmentIdList& id,
-                    const DropCallback& callback) OVERRIDE;
+                    const DropCallback& callback) override;
 
  private:
   virtual ~AttachmentStoreHandle();