MakeExternalFileRef  168 ppapi/tests/test_file_ref.cc   std::string result = MakeExternalFileRef(&file_ref_ext);
MakeExternalFileRef  602 ppapi/tests/test_file_ref.cc   std::string result = MakeExternalFileRef(&file_ref_ext);
MakeExternalFileRef   27 ppapi/tests/test_file_ref.h   std::string MakeExternalFileRef(pp::FileRef* file_ref_ext);