commit 528a834ef079e0821c76b6bb256ddc48602320ea
author perkj <perkj@webrtc.org> Fri Mar 03 08:01:48 2017
committer Commit bot <commit-bot@chromium.org> Fri Mar 03 08:01:48 2017
tree 7b96ad57522da47750e9dbbbc59f96d1efdf5e6b
parent 6e10fd6b6baeb1b4dbd19474234d27170e9d7818

Revert of BlankDetectorDesktopCapturerWrapper to detect a blank DesktopFrame (patchset #7 id:180001 of https://codereview.webrtc.org/2709523003/ )

Reason for revert:
Misses  deps for RTC_HISTOGRAM in Chrome.
email sent separately.

Also see https://codereview.chromium.org/2725143004/.

Original issue's description:
> BlankDetectorDesktopCapturerWrapper to detect a blank DesktopFrame
>
> DXGI capturer highly depends on video adapter and its driver, as well as Windows
> itself. I recently found it cannot work on my virtualbox instance any more,
> which indicates it may not work well on some specific systems. What worse is,
> the APIs do not return a failure in such case.
>
> So this change adds a BlankDetectorDesktopCapturerWrapper, which samples several
> pixels in the frame returned by a DesktopCapturer implementation. If all the
> pixels selected are blank, this wrapper returns a failure. A typical usage is to
> combine BlankDetectorDesktopCapturerWrapper with FallbackDesktopCapturerWrapper,
> and use GDI capturer in case of failure.
>
> Usually less than 500 pixels are checked, so the
> BlankDetectorDesktopCapturerWrapper should not impact the capturer performance.
>
> This change is expected to resolve bug 682112 in another dimension.
>
> BUG=682112
>
> Review-Url: https://codereview.webrtc.org/2709523003
> Cr-Commit-Position: refs/heads/master@{#16984}
> Committed: https://chromium.googlesource.com/external/webrtc/+/c4e9d210b3516c7b2faa32f24409a2e626599255

TBR=sergeyu@chromium.org,zijiehe@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=682112

Review-Url: https://codereview.webrtc.org/2726983005
Cr-Commit-Position: refs/heads/master@{#16993}