IsHeadSurrogate   966 third_party/protobuf/src/google/protobuf/io/tokenizer.cc   GOOGLE_DCHECK(IsHeadSurrogate(head_surrogate));
IsHeadSurrogate   995 third_party/protobuf/src/google/protobuf/io/tokenizer.cc   if (IsHeadSurrogate(*code_point) && *p == '\\' && *(p + 1) == 'u') {