Mac: Eliminate unintended "menu" method overrides.

chrome/browser/cocoa/menu_button_unittest.mm

Index: chrome/browser/cocoa/menu_button_unittest.mm
diff --git a/chrome/browser/cocoa/menu_button_unittest.mm b/chrome/browser/cocoa/menu_button_unittest.mm
index 1861974248c8dfe7c5243cf62566419248ad1b8b..321a3bb43f69536caebcbe9dde9546c53d80b850 100644
--- a/chrome/browser/cocoa/menu_button_unittest.mm
+++ b/chrome/browser/cocoa/menu_button_unittest.mm
@@ -51,14 +51,14 @@ TEST_F(MenuButtonTest, MenuAssign) {
   [menu insertItemWithTitle:@"bar" action:nil keyEquivalent:@"" atIndex:2];
   [menu insertItemWithTitle:@"baz" action:nil keyEquivalent:@"" atIndex:3];
   
-  [button_ setMenu:menu];
-  EXPECT_TRUE([button_ menu]);
+  [button_ setAttachedMenu:menu];
+  EXPECT_TRUE([button_ attachedMenu]);
 
   // TODO(viettrungluu): Display the menu. (The tough part is closing the menu,
   // not opening it!)
 
   // Since |button_| doesn't retain menu, we should probably unset it here.
-  [button_ setMenu:nil];
+  [button_ setAttachedMenu:nil];
 }
 
 }  // namespace