Add QuicStringPiece which is actually StringPiece.

net/quic/core/quic_packets.h

Index: net/quic/core/quic_packets.h
diff --git a/net/quic/core/quic_packets.h b/net/quic/core/quic_packets.h
index 80398e04e0e5ef493be5d320d66aad26ebb852da..05bd01ce3bb513a8374b6e976118c2f0f5229048 100644
--- a/net/quic/core/quic_packets.h
+++ b/net/quic/core/quic_packets.h
@@ -15,7 +15,6 @@
 #include <vector>
 
 #include "base/macros.h"
-#include "base/strings/string_piece.h"
 #include "net/base/iovec.h"
 #include "net/quic/core/frames/quic_frame.h"
 #include "net/quic/core/quic_ack_listener_interface.h"
@@ -27,6 +26,7 @@
 #include "net/quic/core/quic_versions.h"
 #include "net/quic/platform/api/quic_export.h"
 #include "net/quic/platform/api/quic_socket_address.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 
 namespace net {
 
@@ -108,8 +108,8 @@ class QUIC_EXPORT_PRIVATE QuicData {
   QuicData(const char* buffer, size_t length, bool owns_buffer);
   virtual ~QuicData();
 
-  base::StringPiece AsStringPiece() const {
-    return base::StringPiece(data(), length());
+  QuicStringPiece AsStringPiece() const {
+    return QuicStringPiece(data(), length());
   }
 
   const char* data() const { return buffer_; }
@@ -136,8 +136,8 @@ class QUIC_EXPORT_PRIVATE QuicPacket : public QuicData {
              bool includes_diversification_nonce,
              QuicPacketNumberLength packet_number_length);
 
-  base::StringPiece AssociatedData(QuicVersion version) const;
-  base::StringPiece Plaintext(QuicVersion version) const;
+  QuicStringPiece AssociatedData(QuicVersion version) const;
+  QuicStringPiece Plaintext(QuicVersion version) const;
 
   char* mutable_data() { return buffer_; }