SyncFS: Clean up callbacks in v1 tests

chrome/browser/sync_file_system/sync_file_system_test_util.h

Index: chrome/browser/sync_file_system/sync_file_system_test_util.h
diff --git a/chrome/browser/sync_file_system/sync_file_system_test_util.h b/chrome/browser/sync_file_system/sync_file_system_test_util.h
index 64ad73c6507a81f8933b6bd748569fc36727a04e..c355067f95e0c7b5a5b2a0aa0f39976c487c6846 100644
--- a/chrome/browser/sync_file_system/sync_file_system_test_util.h
+++ b/chrome/browser/sync_file_system/sync_file_system_test_util.h
@@ -5,6 +5,8 @@
 #ifndef CHROME_BROWSER_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_TEST_UTIL_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_TEST_UTIL_H_
 
+#include <vector>
+
 #include "base/bind.h"
 #include "base/callback.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -29,6 +31,11 @@ struct TypeTraits<fileapi::FileSystemURL> {
   typedef const fileapi::FileSystemURL& ParamType;
 };
 
+template <typename T>
+struct TypeTraits<std::vector<T> > {
+  typedef const std::vector<T>& ParamType;
+};
+
 template <typename Arg1, typename Arg2, typename Param1, typename Param2>
 void ReceiveResult2(bool* done,
                     Arg1* arg1_out,