Use a direct include of strings headers in webkit/, part 1.

webkit/browser/database/database_util.h

 // Copyright (c) 2010 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 WEBKIT_BROWSER_DATABASE_DATABASE_UTIL_H_
 #define WEBKIT_BROWSER_DATABASE_DATABASE_UTIL_H_
 
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/storage/webkit_storage_export.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace webkit_database {
 
 class DatabaseTracker;
@@ skipping 10 matching lines @@
                                base::string16* sqlite_suffix);
   static base::FilePath GetFullFilePathForVfsFile(
       DatabaseTracker* db_tracker,
       const base::string16& vfs_file_name);
   static bool IsValidOriginIdentifier(const base::string16& origin_identifier);
 };
 
 }  // namespace webkit_database
 
 #endif  // WEBKIT_BROWSER_DATABASE_DATABASE_UTIL_H_