Use a direct include of utf_string_conversions.h in content/.

content/shell/shell_javascript_dialog_gtk.cc

 // 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.
 
 #include "content/shell/shell_javascript_dialog.h"
 
 #include <gtk/gtk.h>
 
 #include "base/logging.h"
 #include "base/string_util.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "content/shell/app/resource.h"
 #include "content/shell/shell.h"
 #include "content/shell/shell_javascript_dialog_manager.h"
 
 namespace {
 
 const char kPromptTextId[] = "content_shell_prompt_text";
 
 // If there's a text entry in the dialog, get the text from the first one and
 // return it.
@@ skipping 96 matching lines @@
     default:
       NOTREACHED();
   }
 
   gtk_widget_destroy(dialog);
 
   manager_->DialogClosed(this);
 }
 
 }  // namespace content