Added the "Show as Tab" option for popups on OSX

chrome/browser/ui/cocoa/browser_window_command_handler.mm

Index: chrome/browser/ui/cocoa/browser_window_command_handler.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_command_handler.mm b/chrome/browser/ui/cocoa/browser_window_command_handler.mm
index 4f88b46e4ff48c3a000a95af8e37fbb3a2a80d5f..78c125eb7db200b31e660c5d89fdfc6ddd5ca327 100644
--- a/chrome/browser/ui/cocoa/browser_window_command_handler.mm
+++ b/chrome/browser/ui/cocoa/browser_window_command_handler.mm
@@ -220,6 +220,11 @@ Browser* FindBrowserForSender(id sender, NSWindow* window) {
         enable = NO;
       }
     }
+    case IDC_SHOW_AS_TAB: {
+      // Hide this menu option if the window is tabbed.
+      NSMenuItem* menuItem = base::mac::ObjCCast<NSMenuItem>(item);
+      [menuItem setHidden:browser->is_type_tabbed()];

[erikchen, 2016/02/10 03:13:13]

Missing break for this case, and the one above it?

[spqchan, 2016/02/10 17:27:06]

Done.

+    }
     default:
       // Special handling for the contents of the Text Encoding submenu. On
       // Mac OS, instead of enabling/disabling the top-level menu item, we