[Mac] Move UI item validation to UserInterfaceItemCommandHandler.

chrome/browser/ui/cocoa/browser_window_controller.h

Index: chrome/browser/ui/cocoa/browser_window_controller.h
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.h b/chrome/browser/ui/cocoa/browser_window_controller.h
index 0fbbad76f3ae71d6900879b8f32ab444ddeec47e..514f4ee9518b9849836461fab46d74b965ea456a 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.h
+++ b/chrome/browser/ui/cocoa/browser_window_controller.h
@@ -58,11 +58,10 @@ namespace extensions {
 class Command;
 }
 
-@interface BrowserWindowController :
-  TabWindowController<NSUserInterfaceValidations,
-                      BookmarkBarControllerDelegate,
-                      ViewResizer,
-                      TabStripControllerDelegate> {
+@interface BrowserWindowController
+    : TabWindowController<BookmarkBarControllerDelegate,
+                          ViewResizer,
+                          TabStripControllerDelegate> {
  @private
   // The ordering of these members is important as it determines the order in
   // which they are destroyed. |browser_| needs to be destroyed last as most of
@@ -499,9 +498,6 @@ class Command;
 // or exit Lion fullscreen mode.  Must not be called on Snow Leopard or earlier.
 - (void)handleLionToggleFullscreen;
 
-// The title of the fullscreen menu item in the menu bar.
-- (NSString*)titleForFullscreenMenuItem;
-
 // Enters Browser/Appkit Fullscreen.
 // If |withToolbar| is NO, the tab strip and toolbar are hidden
 // (aka Presentation Mode).