net: Update the include paths of base/string_piece.h to its new location.

net/http/http_response_headers.cc

 // Copyright (c) 2012 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.
 
 // The rules for header parsing were borrowed from Firefox:
 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpResponseHead.cpp
 // The rules for parsing content-types were also borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_response_headers.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/pickle.h"
+#include "base/string_number_conversions.h"
+#include "base/string_util.h"
 #include "base/stringprintf.h"
-#include "base/string_number_conversions.h"
-#include "base/string_piece.h"
-#include "base/string_util.h"
+#include "base/strings/string_piece.h"
 #include "base/time.h"
 #include "base/values.h"
 #include "net/base/escape.h"
 #include "net/http/http_util.h"
 
 using base::StringPiece;
 using base::Time;
 using base::TimeDelta;
 
 namespace net {
@@ skipping 1312 matching lines @@
   return true;
 }
 
 bool HttpResponseHeaders::IsChunkEncoded() const {
   // Ignore spurious chunked responses from HTTP/1.0 servers and proxies.
   return GetHttpVersion() >= HttpVersion(1, 1) &&
       HasHeaderValue("Transfer-Encoding", "chunked");
 }
 
 }  // namespace net