Add QuicStringPiece which is actually StringPiece.

net/quic/platform/api/quic_url_utils.h

Index: net/quic/platform/api/quic_url_utils.h
diff --git a/net/quic/platform/api/quic_url_utils.h b/net/quic/platform/api/quic_url_utils.h
index 022e041be99818e0c3645fd27ae6b71177dbacd1..d857ba519f94451b26ff8607020346b7f402ac12 100644
--- a/net/quic/platform/api/quic_url_utils.h
+++ b/net/quic/platform/api/quic_url_utils.h
@@ -7,6 +7,7 @@
 
 #include "base/macros.h"
 #include "net/quic/platform/api/quic_export.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 #include "net/quic/platform/impl/quic_url_utils_impl.h"
 
 namespace net {
@@ -14,12 +15,12 @@ namespace net {
 class QUIC_EXPORT_PRIVATE QuicUrlUtils {
  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(QuicUrlUtils);