Add QuicStringPiece which is actually StringPiece.

net/quic/chromium/quic_end_to_end_unittest.cc

Index: net/quic/chromium/quic_end_to_end_unittest.cc
diff --git a/net/quic/chromium/quic_end_to_end_unittest.cc b/net/quic/chromium/quic_end_to_end_unittest.cc
index 30e89f18ee55f6af47875f218d59405f881012a4..2be21032ab0408ba10ec84c66ec7b3603f264f65 100644
--- a/net/quic/chromium/quic_end_to_end_unittest.cc
+++ b/net/quic/chromium/quic_end_to_end_unittest.cc
@@ -31,6 +31,7 @@
 #include "net/http/transport_security_state.h"
 #include "net/log/net_log_with_source.h"
 #include "net/proxy/proxy_service.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 #include "net/quic/test_tools/crypto_test_utils.h"
 #include "net/quic/test_tools/quic_test_utils.h"
 #include "net/ssl/default_channel_id_store.h"
@@ -44,8 +45,6 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
-using base::StringPiece;
-
 namespace net {
 
 using test::IsOk;
@@ -189,10 +188,10 @@ class QuicEndToEndTest : public ::testing::TestWithParam<TestParams> {
 
   // Adds an entry to the cache used by the QUIC server to serve
   // responses.
-  void AddToCache(StringPiece path,
+  void AddToCache(QuicStringPiece path,
                   int response_code,
-                  StringPiece response_detail,
-                  StringPiece body) {
+                  QuicStringPiece response_detail,
+                  QuicStringPiece body) {
     response_cache_.AddSimpleResponse("test.example.com", path, response_code,
                                       body);
   }