Move importer files into an importer subdirectory.

chrome/browser/importer/firefox_profile_lock.h

 // Copyright (c) 2006-2008 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_BROWSER_FIREFOX_PROFILE_LOCK_H__
-#define CHROME_BROWSER_FIREFOX_PROFILE_LOCK_H__
+#ifndef CHROME_BROWSER_IMPORTER_FIREFOX_PROFILE_LOCK_H__
+#define CHROME_BROWSER_IMPORTER_FIREFOX_PROFILE_LOCK_H__
 
 #include <windows.h>
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
 // Firefox is designed to allow only one application to access its
 // profile at the same time.
@@ skipping 66 matching lines @@
 
   // Full path of the lock file in the profile folder.
   std::wstring lock_file_;
 
   // The handle of the lock file.
   HANDLE lock_handle_;
 
   DISALLOW_EVIL_CONSTRUCTORS(FirefoxProfileLock);
 };
 
-#endif  // CHROME_BROWSER_FIREFOX_PROFILE_LOCK_H__
+#endif  // CHROME_BROWSER_IMPORTER_FIREFOX_PROFILE_LOCK_H__