Add QuicStringPiece which is actually StringPiece.

net/quic/platform/impl/quic_url_impl.h

 // 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.
 
 #ifndef NET_QUIC_PLATFORM_IMPL_QUIC_URL_IMPL_H_
 #define NET_QUIC_PLATFORM_IMPL_QUIC_URL_IMPL_H_
 
 #include "net/quic/platform/api/quic_export.h"
+#include "net/quic/platform/api/quic_string_piece.h"
 #include "url/gurl.h"
 
 namespace net {
 
 class QUIC_EXPORT_PRIVATE QuicUrlImpl {
  public:
   static const size_t kMaxHostNameLength = 256;
 
   // Constructs an empty QuicUrl.
   QuicUrlImpl() = default;
 
   // Constructs a QuicUrlImpl from the url string |url|.
   // NOTE: If |url| doesn't have a scheme, it will have an empty scheme
   // field. If that's not what you want, use the QuicUrlImpl(url,
   // default_scheme) form below.
-  explicit QuicUrlImpl(base::StringPiece url);
+  explicit QuicUrlImpl(QuicStringPiece url);
 
   // Constructs a QuicUrlImpl from |url|, assuming that the scheme for the URL
   // is |default_scheme| if there is no scheme specified in |url|.
-  QuicUrlImpl(base::StringPiece url, base::StringPiece default_scheme);
+  QuicUrlImpl(QuicStringPiece url, QuicStringPiece default_scheme);
 
   QuicUrlImpl(const QuicUrlImpl& url);
 
   // Returns false if any of these conditions occur:
   // No scheme specified
   // Host name too long (> 256 bytes)
   // Invalid characters in host name, path or params
   // Invalid port number (e.g. greater than 65535)
   bool IsValid() const;
 
@@ skipping 18 matching lines @@
 
   const GURL& url() const { return url_; }
 
  private:
   GURL url_;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_PLATFORM_IMPL_QUIC_URL_IMPL_H_