Use a direct include of strings headers in chrome/test/.

chrome/test/logging/win/file_logger.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 CHROME_TEST_LOGGING_WIN_FILE_LOGGER_H_
 #define CHROME_TEST_LOGGING_WIN_FILE_LOGGER_H_
 
 #include <guiddef.h>
 
 #include "base/basictypes.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/win/event_trace_controller.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace logging_win {
 
 // A file logger instance captures LOG messages and trace events emitted via
 // Event Tracing for Windows (ETW) and sends them to a file.  Events can be
@@ skipping 57 matching lines @@
 
   base::win::EtwTraceController controller_;
   uint32 event_provider_mask_;
 
   DISALLOW_COPY_AND_ASSIGN(FileLogger);
 };
 
 }  // namespace logging_win
 
 #endif  // CHROME_TEST_LOGGING_WIN_FILE_LOGGER_H_