commit ba496ac30606b596aecf5608a1973e300f8e798b
author Avi Drissman <avi@chromium.org> Fri Nov 02 19:48:35 2018
committer Commit Bot <commit-bot@chromium.org> Fri Nov 02 19:48:35 2018
tree 6df4904501aa6e3694330c9b06983aacef1b9d0b
parent 56cbeeebe73ef2d5a8e05fa245c1df2f00e2f5bc

Don't allow popups during page unloading times.

Precisely, this disallows them when the event loop's
termination nesting level is nonzero.

This is now part of the spec,
https://html.spec.whatwg.org/#apis-for-creating-and-navigating-browsing-contexts-by-name

> The window open steps, given a string url, a string target, and a string features, are as follows:
> 1. If the event loop's termination nesting level is nonzero, return null.

BUG=844455

Change-Id: I85fb003063f5ed051049c7c263391835421902ac
Reviewed-on: https://chromium-review.googlesource.com/c/1180296
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Nate Chapin <japhet@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605025}