[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..4303742387ddd8ab6a480a3b514094b94ee7adcc 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.h
+++ b/chrome/browser/ui/cocoa/browser_window_controller.h
@@ -32,6 +32,7 @@ class BookmarkBubbleObserverCocoa;
 class Browser;
 class BrowserWindow;
 class BrowserWindowCocoa;
+@class BrowserWindowCommandHandler;
 @class BrowserWindowFullscreenTransition;
 @class DevToolsController;
 @class DownloadShelfController;
@@ -58,11 +59,10 @@ 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
@@ -85,6 +85,7 @@ class Command;
       exclusiveAccessBubbleWindowController_;
   base::scoped_nsobject<BrowserWindowFullscreenTransition>
       fullscreenTransition_;
+  base::scoped_nsobject<BrowserWindowCommandHandler> commandHandler_;
 
   // Strong. StatusBubble is a special case of a strong reference that
   // we don't wrap in a scoped_ptr because it is acting the same
@@ -499,9 +500,6 @@ 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).