Make GConf dependency optional.

chrome/browser/gtk/browser_titlebar.h

Index: chrome/browser/gtk/browser_titlebar.h
diff --git a/chrome/browser/gtk/browser_titlebar.h b/chrome/browser/gtk/browser_titlebar.h
index c6da8551136698ae458d984de27c6353c2ea25ef..5cd30e622c09639d6e3b12b7476b2fcbc57743cf 100644
--- a/chrome/browser/gtk/browser_titlebar.h
+++ b/chrome/browser/gtk/browser_titlebar.h
@@ -31,6 +31,10 @@ class BrowserTitlebar : public NotificationObserver,
                         public ActiveWindowWatcherX::Observer,
                         public menus::SimpleMenuModel::Delegate {
  public:
+  // A default button order string for when we aren't asking gconf for the
+  // metacity configuration.
+  static const char kDefaultButtonString[];
+
   BrowserTitlebar(BrowserWindowGtk* browser_window, GtkWindow* window);
   virtual ~BrowserTitlebar();