Use a direct include of strings headers in url/, win8/.

win8/delegate_execute/delegate_execute_util.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 "win8/delegate_execute/delegate_execute_util.h"
 
 #include "base/files/file_path.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 
 namespace delegate_execute {
 
 CommandLine CommandLineFromParameters(const wchar_t* params) {
   CommandLine command_line(CommandLine::NO_PROGRAM);
 
   if (params) {
     string16 command_string(L"noprogram.exe ");
     command_string.append(params);
     command_line.ParseFromString(command_string);
@@ skipping 22 matching lines @@
   CommandLine cmd_line(CommandLine::NO_PROGRAM);
 
   cmd_line.AppendSwitch(a_switch);
 
   string16 command_string(cmd_line.GetCommandLineString());
   TrimWhitespace(command_string, TRIM_ALL, &command_string);
   return command_string;
 }
 
 }  // namespace delegate_execute