Add QuicStringPiece which is actually StringPiece.

net/quic/platform/api/quic_url.cc

 // Copyright (c) 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/platform/api/quic_url.h"
 
-using base::StringPiece;
 using std::string;
 
 namespace net {
 
-QuicUrl::QuicUrl(StringPiece url) : impl_(url) {}
+QuicUrl::QuicUrl(QuicStringPiece url) : impl_(url) {}
 
-QuicUrl::QuicUrl(StringPiece url, StringPiece default_scheme)
+QuicUrl::QuicUrl(QuicStringPiece url, QuicStringPiece default_scheme)
     : impl_(url, default_scheme) {}
 
 QuicUrl::QuicUrl(const QuicUrl& url) : impl_(url.impl()) {}
 
 bool QuicUrl::IsValid() const {
   return impl_.IsValid();
 }
 
 string QuicUrl::ToString() const {
   return impl_.ToStringIfValid();
@@ skipping 17 matching lines @@
 
 string QuicUrl::scheme() const {
   return impl_.scheme();
 }
 
 uint16_t QuicUrl::port() const {
   return impl_.port();
 }
 
 }  // namespace net