Use a direct include of strings headers in chrome/browser/media_galleries/.

chrome/browser/media_galleries/fileapi/itunes_library_parser.cc

 // Copyright 2013 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/browser/media_galleries/fileapi/itunes_library_parser.h"
 
 #include <string>
 
 #include "base/logging.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/media_galleries/fileapi/itunes_xml_utils.h"
 #include "googleurl/src/gurl.h"
 #include "googleurl/src/url_canon.h"
 #include "googleurl/src/url_util.h"
 #include "third_party/libxml/chromium/libxml_utils.h"
 
 namespace itunes {
 
@@ skipping 178 matching lines @@
       track_found = true;
     } else {
       no_errors = false;
     }
   }
 
   return track_found || no_errors;
 }
 
 }  // namespace itunes