Chrome Version: 71.0.3551.0
OS: 10.13.6

What steps will reproduce the problem?
(1) Download a file, which then appears in the download shelf
(2) On a page (like Monorail) that has a <input type=file> chooser, open the file chooser
(3) Try to drag the file from the download shelf and drop it onto the open file chooser

You can also copy-and-paste this into the URL bar to have a one-stop download & upload:

data:text/html,<a href="#" download>Download me</a><br><b>upload me:<input type=file>

What is the expected result?
You should be able to drag the downloaded file from the download shelf onto the open file chooser. Doing so should set the selection of the file chooser to the dragged file.

What happens instead?
Dragging the download shelf when the file chooser is open moves the window (?!).

I think this used to work in Cocoa and regressed in MacViews.

Please use labels and text to provide additional information.

If this is a regression (i.e., worked before), please consider using the
bisect tool (https://www.chromium.org/developers/bisect-builds-py) to help
us identify the root cause and more rapidly triage the issue.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.