Convert Pass()→std::move() in sync/

sync/internal_api/attachments/attachment_uploader_impl.cc

Index: sync/internal_api/attachments/attachment_uploader_impl.cc
diff --git a/sync/internal_api/attachments/attachment_uploader_impl.cc b/sync/internal_api/attachments/attachment_uploader_impl.cc
index 735af8c81630ca3e79e305f359a5405aa1a34d7c..e0246d80328cf625742ca349445b9e3b2040d16c 100644
--- a/sync/internal_api/attachments/attachment_uploader_impl.cc
+++ b/sync/internal_api/attachments/attachment_uploader_impl.cc
@@ -5,8 +5,8 @@
 #include "sync/internal_api/public/attachments/attachment_uploader_impl.h"
 
 #include <stdint.h>
-
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "base/base64.h"
@@ -329,7 +329,7 @@ void AttachmentUploaderImpl::UploadAttachment(const Attachment& attachment,
       url, url_request_context_getter_, attachment, callback, account_id_,
       scopes_, token_service_provider_.get(), raw_store_birthday_,
       weak_ptr_factory_.GetWeakPtr(), model_type_));
-  state_map_.add(unique_id, upload_state.Pass());
+  state_map_.add(unique_id, std::move(upload_state));
 }
 
 // Static.