Add QuicStringPiece which is actually StringPiece.

net/quic/platform/impl/quic_url_utils_impl.h

Index: net/quic/platform/impl/quic_url_utils_impl.h
diff --git a/net/quic/platform/impl/quic_url_utils_impl.h b/net/quic/platform/impl/quic_url_utils_impl.h
index 31fbfec32ed811708904ab5ae1e3447cd5157281..6db0abb3b9eb40a29d6e68c63fc0836ff036eda3 100644
--- a/net/quic/platform/impl/quic_url_utils_impl.h
+++ b/net/quic/platform/impl/quic_url_utils_impl.h
@@ -6,21 +6,21 @@
 #define NET_QUIC_PLATFORM_IMPL_QUIC_URL_UTILS_IMPL_H_
 
 #include "base/macros.h"
-#include "base/strings/string_piece.h"
 #include "net/quic/core/quic_server_id.h"
 #include "net/quic/platform/api/quic_export.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 
 namespace net {
 
 class QUIC_EXPORT_PRIVATE QuicUrlUtilsImpl {
  public:
   // Returns hostname, or empty std::string if missing.
-  static std::string HostName(base::StringPiece url);
+  static std::string HostName(QuicStringPiece url);
 
   // Returns false if any of these conditions occur: (1) Host name too long; (2)
   // Invalid characters in host name, path or params; (3) Invalid port number
   // (e.g. greater than 65535).
-  static bool IsValidUrl(base::StringPiece url);
+  static bool IsValidUrl(QuicStringPiece url);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicUrlUtilsImpl);