Linux: expose "Use system title bar and borders" preference in options dialog.

chrome/browser/gtk/options/content_page_gtk.h

 // Copyright (c) 2009 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_GTK_OPTIONS_CONTENT_PAGE_GTK_H_
 #define CHROME_BROWSER_GTK_OPTIONS_CONTENT_PAGE_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "chrome/browser/options_page_base.h"
@@ skipping 31 matching lines @@
                                       ContentPageGtk* page);
 
   // Callback for reset default theme button.
   static void OnResetDefaultThemeButtonClicked(GtkButton* widget,
                                                ContentPageGtk* page);
 
   // Callback for get themes button.
   static void OnGetThemesButtonClicked(GtkButton* widget,
                                        ContentPageGtk* page);
 
+  // Callback for system title bar checkbox.
+  static void OnSystemTitleBarCheckboxClicked(GtkButton* widget,
+                                              ContentPageGtk* page);
+
   // Callback for passwords exceptions button.
   static void OnPasswordsExceptionsButtonClicked(GtkButton* widget,
                                                  ContentPageGtk* page);
 
   // Callback for password radio buttons.
   static void OnPasswordRadioToggled(GtkToggleButton* widget,
                                      ContentPageGtk* page);
 
   // Callback for form autofill radio buttons.
   static void OnAutofillRadioToggled(GtkToggleButton* widget,
                                      ContentPageGtk* page);
 
   // Widgets for the Password saving group.
   GtkWidget* passwords_asktosave_radio_;
   GtkWidget* passwords_neversave_radio_;
 
-  // Widget for the Form Autofill group.
+  // Widgets for the Form Autofill group.
   GtkWidget* form_autofill_asktosave_radio_;
   GtkWidget* form_autofill_neversave_radio_;
 
+  // Widgets for the Themes group.
+  GtkWidget* system_title_bar_checkbox_;
+
   // The parent GtkTable widget
   GtkWidget* page_;
 
   // Pref members.
   BooleanPrefMember ask_to_save_passwords_;
   BooleanPrefMember ask_to_save_form_autofill_;
+  BooleanPrefMember use_custom_chrome_frame_;
 
   // Flag to ignore gtk callbacks while we are loading prefs, to avoid
   // then turning around and saving them again.
   bool initializing_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentPageGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_OPTIONS_CONTENT_PAGE_GTK_H_