Fixed behavior of the bookmark bar visibility.

chrome/browser/ui/cocoa/browser_window_cocoa.h

Index: chrome/browser/ui/cocoa/browser_window_cocoa.h
diff --git a/chrome/browser/ui/cocoa/browser_window_cocoa.h b/chrome/browser/ui/cocoa/browser_window_cocoa.h
index e1b0c3c5bb989926a317fbf2e33dcfed8bbe583b..0e14019e55622e4c15d72bfe5ffec7c801c628e7 100644
--- a/chrome/browser/ui/cocoa/browser_window_cocoa.h
+++ b/chrome/browser/ui/cocoa/browser_window_cocoa.h
@@ -9,6 +9,7 @@
 #include "base/memory/scoped_nsobject.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
+#include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "content/common/notification_registrar.h"
 #include "ui/base/ui_base_types.h"
@@ -136,6 +137,7 @@ class BrowserWindowCocoa : public BrowserWindow,
   void UpdateSidebarForContents(TabContents* tab_contents);
 
   NotificationRegistrar registrar_;
+  PrefChangeRegistrar pref_change_registrar_;
   Browser* browser_;  // weak, owned by controller
   BrowserWindowController* controller_;  // weak, owns us
   base::WeakPtrFactory<Browser> confirm_close_factory_;