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-rw-r--r--base/string16.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/base/string16.h b/base/string16.h
index f545286..11f79e3 100644
--- a/base/string16.h
+++ b/base/string16.h
@@ -124,6 +124,8 @@ struct string16_char_traits {
typedef std::basic_string<char16, base::string16_char_traits> string16;
+extern std::ostream& operator<<(std::ostream& out, const string16& str);
+
#endif // WCHAR_T_IS_UTF32
#endif // BASE_STRING16_H_