Add QuicStringPiece which is actually StringPiece.

net/quic/core/crypto/cert_compressor_test.cc

Index: net/quic/core/crypto/cert_compressor_test.cc
diff --git a/net/quic/core/crypto/cert_compressor_test.cc b/net/quic/core/crypto/cert_compressor_test.cc
index 2ab9094c8d5806789691f78308da9e95e0892fbf..af6f6174c60d77bfdb574a757d23f692078518d2 100644
--- a/net/quic/core/crypto/cert_compressor_test.cc
+++ b/net/quic/core/crypto/cert_compressor_test.cc
@@ -11,7 +11,6 @@
 #include "net/quic/test_tools/crypto_test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using base::StringPiece;
 using std::string;
 
 namespace net {
@@ -20,7 +19,7 @@ namespace test {
 TEST(CertCompressor, EmptyChain) {
   std::vector<string> chain;
   const string compressed = CertCompressor::CompressChain(
-      chain, StringPiece(), StringPiece(), nullptr);
+      chain, QuicStringPiece(), QuicStringPiece(), nullptr);
   EXPECT_EQ("00", QuicTextUtils::HexEncode(compressed));
 
   std::vector<string> chain2, cached_certs;
@@ -33,7 +32,7 @@ TEST(CertCompressor, Compressed) {
   std::vector<string> chain;
   chain.push_back("testcert");
   const string compressed = CertCompressor::CompressChain(
-      chain, StringPiece(), StringPiece(), nullptr);
+      chain, QuicStringPiece(), QuicStringPiece(), nullptr);
   ASSERT_GE(compressed.size(), 2u);
   EXPECT_EQ("0100", QuicTextUtils::HexEncode(compressed.substr(0, 2)));
 
@@ -52,8 +51,9 @@ TEST(CertCompressor, Common) {
       crypto_test_utils::MockCommonCertSets(chain[0], set_hash, 1));
   const string compressed = CertCompressor::CompressChain(
       chain,
-      StringPiece(reinterpret_cast<const char*>(&set_hash), sizeof(set_hash)),
-      StringPiece(), common_sets.get());
+      QuicStringPiece(reinterpret_cast<const char*>(&set_hash),
+                      sizeof(set_hash)),
+      QuicStringPiece(), common_sets.get());
   EXPECT_EQ(
       "03"               /* common */
       "2a00000000000000" /* set hash 42 */
@@ -72,9 +72,9 @@ TEST(CertCompressor, Cached) {
   std::vector<string> chain;
   chain.push_back("testcert");
   uint64_t hash = QuicUtils::FNV1a_64_Hash(chain[0]);
-  StringPiece hash_bytes(reinterpret_cast<char*>(&hash), sizeof(hash));
-  const string compressed =
-      CertCompressor::CompressChain(chain, StringPiece(), hash_bytes, nullptr);
+  QuicStringPiece hash_bytes(reinterpret_cast<char*>(&hash), sizeof(hash));
+  const string compressed = CertCompressor::CompressChain(
+      chain, QuicStringPiece(), hash_bytes, nullptr);
 
   EXPECT_EQ("02" /* cached */ + QuicTextUtils::HexEncode(hash_bytes) +
                 "00" /* end of list */,