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

win8/delegate_execute/delegate_execute_operation.h

 // 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.
 
 #ifndef WIN8_DELEGATE_EXECUTE_DELEGATE_EXECUTE_OPERATION_H_
 #define WIN8_DELEGATE_EXECUTE_DELEGATE_EXECUTE_OPERATION_H_
 
 #include <windows.h>
 #include <atldef.h>
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 
 class CommandLine;
 
 namespace delegate_execute {
 
 // Parses a portion of the DelegateExecute handler's command line to determine
 // the desired operation. The operation type is decided by looking at the
 // command line. The operations are:
 // DELEGATE_EXECUTE:
 //   When the delegate_execute.exe is invoked by windows when a chrome
@@ skipping 45 matching lines @@
   string16 relaunch_flags_;
   base::FilePath relaunch_shortcut_;
   string16 mutex_;
 
   DISALLOW_COPY_AND_ASSIGN(DelegateExecuteOperation);
 };
 
 }  // namespace delegate_execute
 
 #endif  // WIN8_DELEGATE_EXECUTE_DELEGATE_EXECUTE_OPERATION_H_