Update from https://crrev.com/311346

net/tools/balsa/balsa_headers.cc

Index: net/tools/balsa/balsa_headers.cc
diff --git a/net/tools/balsa/balsa_headers.cc b/net/tools/balsa/balsa_headers.cc
index a77b75b89e5d99aa569836fd9453949d6c2f3afb..c1daa4218e9a9a7ddbffab3911669722dcc90bf3 100644
--- a/net/tools/balsa/balsa_headers.cc
+++ b/net/tools/balsa/balsa_headers.cc
@@ -771,6 +771,11 @@ void BalsaHeaders::DumpToString(std::string* str) const {
     return;
   }
 
+  DumpHeadersToString(str);
+}
+
+void BalsaHeaders::DumpHeadersToString(std::string* str) const {
+  const base::StringPiece firstline = first_line();
   // If the header is complete, then just dump them with the logical key value
   // pair.
   str->reserve(str->size() + GetSizeForWriteBuffer());