Add QuicStringPiece which is actually StringPiece.

net/quic/platform/impl/quic_url_impl.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/impl/quic_url_impl.h"
 
 #include "net/quic/platform/api/quic_text_utils.h"
 
-using base::StringPiece;
 using std::string;
 
 namespace net {
 
-QuicUrlImpl::QuicUrlImpl(StringPiece url) : url_(url) {}
+QuicUrlImpl::QuicUrlImpl(QuicStringPiece url) : url_(url) {}
 
-QuicUrlImpl::QuicUrlImpl(StringPiece url, StringPiece default_scheme)
+QuicUrlImpl::QuicUrlImpl(QuicStringPiece url, QuicStringPiece default_scheme)
     : url_(url) {
   if (url_.has_scheme()) {
     return;
   }
   string buffer = default_scheme.as_string() + "://" + url.as_string();
   url_ = GURL(buffer);
 }
 
 QuicUrlImpl::QuicUrlImpl(const QuicUrlImpl& url) : url_(url.url()) {}
 
@@ skipping 71 matching lines @@
   }
 
   int port = url_.EffectiveIntPort();
   if (port == url::PORT_UNSPECIFIED) {
     return 0;
   }
   return port;
 }
 
 }  // namespace net