Clang/mac: Get unit_tests built.

chrome/browser/cocoa/bookmark_bar_controller.mm

 // 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.
 
 #import "chrome/browser/cocoa/bookmark_bar_controller.h"
 #include "app/l10n_util_mac.h"
 #include "app/resource_bundle.h"
 #include "base/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_editor.h"
@@ skipping 770 matching lines @@
   } else {
     // Oops! An animation we don't know how to handle.
     return NO;
   }
 
   return YES;
 }
 
 // Enable or disable items.  We are the menu delegate for both the bar
 // and for bookmark folder buttons.
-- (BOOL)validateUserInterfaceItem:(id)item {
+- (BOOL)validateUserInterfaceItem:(id<NSValidatedUserInterfaceItem>)anItem {
+  NSMenuItem* item = (NSMenuItem*)anItem;  // FIXME: clang wants this.
   // Yes for everything we don't explicitly deny.
   if (![item isKindOfClass:[NSMenuItem class]])
     return YES;
 
   // Yes if we're not a special BookmarkMenu.
   if (![[item menu] isKindOfClass:[BookmarkMenu class]])
     return YES;
 
   // No if we think it's a special BookmarkMenu but have trouble.
   const BookmarkNode* node = [self nodeFromMenuItem:item];
@@ skipping 1537 matching lines @@
 // to minimize touching the object passed in (likely a mock).
 - (void)setButtonContextMenu:(id)menu {
   buttonContextMenu_ = menu;
 }
 
 - (void)setIgnoreAnimations:(BOOL)ignore {
   ignoreAnimations_ = ignore;
 }
 
 @end