SysUTF8ToWide 19 base/strings/sys_string_conversions_posix.cc std::wstring SysUTF8ToWide(const StringPiece& utf8) { SysUTF8ToWide 19 base/strings/sys_string_conversions_win.cc std::wstring SysUTF8ToWide(const StringPiece& utf8) {