UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36

Steps to reproduce the problem:
https://developer.chrome.com/extensions/contextMenus#method-create

use chrome.contextMenu.create and try to provide an icon.

What is the expected behavior?
There should be a way to specify an icon per context menu entry, just as toolbar buttons can specify icons.

What went wrong?
The contextMenu.create API for extensions doesn't have a way to specify an icon.

Did this work before? N/A 

Chrome version: 56.0.2924.76  Channel: canary
OS Version: Gentoo
Flash Version: Shockwave Flash 24.0 r0

I use the "External Application Button"[1] to switch links/pages between chrome/chromium. I filed a request with the developer[2] to be able to add icons other than the extension icon in the context menu entry. The developer directed me to the API manual[3]. Please add a way to change icons for extension menu entries. If toolbar buttons can change icons, why not the context menu?

[1] https://chrome.google.com/webstore/detail/external-application-butt/bifmfjgpgndemajpeeoiopbeilbaifdo
[2] https://github.com/andy-portmen/native-client/issues/3
[3] https://developer.chrome.com/extensions/contextMenus#method-create