Parent resizable fails to receive resize notification when under shadow DOM.

[n1ywb]

Description

Parent resizables fail to receive resize notification when under shadow DOM.

Commenting out this line fixes the issue: https://github.com/PolymerElements/iron-resizable-behavior/blob/master/iron-resizable-behavior.html#L136

See also PolymerElements/paper-menu-button#123

Shady DOM event call tree

Shadow DOM event call tree; note lack of call to _onDescendantIronResize()

Expected outcome

The menu dropdown should resize to accommodate the submenu when the submenu is opened

Expected result

Actual outcome

The menu does not resize and is super skinny and fubar

Live Demo

https://readingplus.github.io/paper-menu-sizing-bug/components/paper-menu-sizing-bug/demo/index.html?dom=shadow

Steps to reproduce

1. open demo using shadow DOM
2. click on menu button
3. click on submenu

Note that if you leave the submenu opened, close the menu, then reopen the menu, it will then resize to accommodate the submenu; this is, however, annoying to have to do.

Browsers Affected

• Chrome
• Firefox
• Safari 9
• Safari 8
• Safari 7
• Edge
• IE 11
• IE 10

[n1ywb]

Looks like this patch might be related to this issue: DreamworldSolutions@b246ff3

[RoXuS]

👍

An other example of the issue -> http://jsbin.com/codakapiwu/edit?html,console,output

[n1ywb]

Folks there's been a PR sitting in here for a year to fix this bug; can we get it merged? @notwaldorf can you help us out with this?