Fix drop event location being incorrect at hidpi.

Fix drop event location being incorrect at hidpi.

Only a problem with use-zoom-for-dsf on, but that is now default on Windows and
ChromeOS.

BUG=644421
Committed: https://crrev.com/9d8c853ad24d06a02013df4335a230be723c3065
Cr-Commit-Position: refs/heads/master@{#421271}

[Bret, 2016-09-23 21:03:42]

Description was changed from

==========
Fix drop event location being incorrect at hidpi.

BUG=644421
==========

to

==========
Fix drop event location being incorrect at hidpi.

Only a problem with use-zoom-for-dsf on, but that is now default on Windows and
ChromeOS.

BUG=644421
==========

[Bret, 2016-09-23 21:03:42]

bsep@chromium.org changed reviewers:
+ jam@chromium.org

[Bret, 2016-09-23 21:06:42]

I tried to add a test for this but it turned out to be very tricky. Webkit
layout tests skip this codepath.

[jam, 2016-09-26 15:08:21]

lgtm

[Bret, 2016-09-27 17:22:28]

The CQ bit was checked by bsep@chromium.org

[commit-bot: I haz the power, 2016-09-27 17:22:52]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-27 18:19:46]

Description was changed from

==========
Fix drop event location being incorrect at hidpi.

Only a problem with use-zoom-for-dsf on, but that is now default on Windows and
ChromeOS.

BUG=644421
==========

to

==========
Fix drop event location being incorrect at hidpi.

Only a problem with use-zoom-for-dsf on, but that is now default on Windows and
ChromeOS.

BUG=644421
==========

[commit-bot: I haz the power, 2016-09-27 18:19:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-27 18:22:55]

Description was changed from

==========
Fix drop event location being incorrect at hidpi.

Only a problem with use-zoom-for-dsf on, but that is now default on Windows and
ChromeOS.

BUG=644421
==========

to

==========
Fix drop event location being incorrect at hidpi.

Only a problem with use-zoom-for-dsf on, but that is now default on Windows and
ChromeOS.

BUG=644421

Committed: https://crrev.com/9d8c853ad24d06a02013df4335a230be723c3065
Cr-Commit-Position: refs/heads/master@{#421271}
==========

[commit-bot: I haz the power, 2016-09-27 18:22:57]

Patchset 1 (id:??) landed as
https://crrev.com/9d8c853ad24d06a02013df4335a230be723c3065
Cr-Commit-Position: refs/heads/master@{#421271}