Add QuicStringPiece which is actually StringPiece.

net/quic/core/quic_header_list.cc

Index: net/quic/core/quic_header_list.cc
diff --git a/net/quic/core/quic_header_list.cc b/net/quic/core/quic_header_list.cc
index 8b71fe7aeea9b9527bc67f0282a60f025d3340c8..ad8f999b2cf81eec17afc5fa47fb24e174308ca9 100644
--- a/net/quic/core/quic_header_list.cc
+++ b/net/quic/core/quic_header_list.cc
@@ -31,7 +31,7 @@ void QuicHeaderList::OnHeaderBlockStart() {
       << "OnHeaderBlockStart called more than once!";
 }
 
-void QuicHeaderList::OnHeader(base::StringPiece name, base::StringPiece value) {
+void QuicHeaderList::OnHeader(QuicStringPiece name, QuicStringPiece value) {
   // Avoid infinte buffering of headers. No longer store headers
   // once the current headers are over the limit.
   if (uncompressed_header_bytes_ == 0 || !header_list_.empty()) {