Add QuicStringPiece which is actually StringPiece.

net/tools/quic/quic_client_bin.cc

Index: net/tools/quic/quic_client_bin.cc
diff --git a/net/tools/quic/quic_client_bin.cc b/net/tools/quic/quic_client_bin.cc
index 07d13e1952afd489a05b56bd304323b355d7e5fa..286f51d7ef7ed7eb603cd5c2a56c44ebc6e98bc7 100644
--- a/net/tools/quic/quic_client_bin.cc
+++ b/net/tools/quic/quic_client_bin.cc
@@ -56,6 +56,7 @@
 #include "net/quic/core/quic_server_id.h"
 #include "net/quic/platform/api/quic_socket_address.h"
 #include "net/quic/platform/api/quic_str_cat.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 #include "net/quic/platform/api/quic_text_utils.h"
 #include "net/quic/platform/api/quic_url.h"
 #include "net/spdy/spdy_header_block.h"
@@ -63,13 +64,13 @@
 #include "net/tools/quic/quic_client.h"
 #include "net/tools/quic/synchronous_host_resolver.h"
 
-using base::StringPiece;
 using net::CertVerifier;
 using net::CTPolicyEnforcer;
 using net::CTVerifier;
 using net::MultiLogCTVerifier;
 using net::ProofVerifier;
 using net::ProofVerifierChromium;
+using net::QuicStringPiece;
 using net::QuicTextUtils;
 using net::QuicUrl;
 using net::SpdyHeaderBlock;
@@ -111,7 +112,7 @@ class FakeProofVerifier : public ProofVerifier {
       const uint16_t /*port*/,
       const string& /*server_config*/,
       net::QuicVersion /*quic_version*/,
-      StringPiece /*chlo_hash*/,
+      QuicStringPiece /*chlo_hash*/,
       const std::vector<string>& /*certs*/,
       const string& /*cert_sct*/,
       const string& /*signature*/,
@@ -309,12 +310,12 @@ int main(int argc, char* argv[]) {
   header_block[":path"] = url.PathParamsQuery();
 
   // Append any additional headers supplied on the command line.
-  for (StringPiece sp : QuicTextUtils::Split(FLAGS_headers, ';')) {
+  for (QuicStringPiece sp : QuicTextUtils::Split(FLAGS_headers, ';')) {
     QuicTextUtils::RemoveLeadingAndTrailingWhitespace(&sp);
     if (sp.empty()) {
       continue;
     }
-    std::vector<StringPiece> kv = QuicTextUtils::Split(sp, ':');
+    std::vector<QuicStringPiece> kv = QuicTextUtils::Split(sp, ':');
     QuicTextUtils::RemoveLeadingAndTrailingWhitespace(&kv[0]);
     QuicTextUtils::RemoveLeadingAndTrailingWhitespace(&kv[1]);
     header_block[kv[0]] = kv[1];