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

chrome_frame/test/chrome_frame_test_utils.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.
 
 #include "chrome_frame/test/chrome_frame_test_utils.h"
 
 #include <atlapp.h>
 #include <atlmisc.h>
 #include <iepmapi.h>
 #include <sddl.h>
 #include <shlobj.h>
 #include <winsock2.h>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/file_version_info.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/process.h"
 #include "base/process_util.h"
 #include "base/string_number_conversions.h"
-#include "base/string_piece.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
+#include "base/strings/string_piece.h"
 #include "base/utf_string_conversions.h"
 #include "base/win/registry.h"
 #include "base/win/scoped_handle.h"
 #include "base/win/windows_version.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_paths_internal.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "chrome_frame/utils.h"
 #include "net/base/net_util.h"
@@ skipping 697 matching lines @@
   if (address.empty()) {
     LOG(ERROR) << "Failed to find a non-loopback IP_V4 address. Tests will be "
                << "run over the loopback adapter, which may result in hangs.";
     address.assign("127.0.0.1");
   }
 
   return address;
 }
 
 }  // namespace chrome_frame_test