commit 7f1583c9214173f67b3c7f70c7fce7f5846142d1
author braveyao <braveyao@webrtc.org> Wed May 30 16:48:56 2018 -0700
committer Commit Bot <commit-bot@chromium.org> Thu May 31 17:07:16 2018 +0000
tree 3ce3841176555e20ab1705584e977f4ab5764fcf
parent 435187d18d8e72b046458fb7fc2c9cd10495e4c7

[desktopCapture Windows] ignore Chrome notification window on top

Chrome uses Windows native framework to show the notification of the
ongoing presenting. This notification window is enumerated as a
separated window which is on top most. If this window blocks the target
window, Chrome can't do the cropping and has to switch to GDI methods.
If GDI methods can't capture the target window, then capturing will fail
until the notification is dismissed.

It's hard to identify the notification window in EnumWindows() callback.
So far it works if we ignore window with no title and class name
prefixed with "Chrome_WidgetWin_" and with certain extended styles,
as so does in this CL.

Bug: chromium:847664
Change-Id: Iafabcb1f685adb91bf092475642151e1475cdf61
Reviewed-on: https://webrtc-review.googlesource.com/79742
Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Commit-Queue: Brave Yao <braveyao@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23474}