Check child windows in CroppingWindowCapturerWin
On Windows a window may be covered by its own child window. So this change also
detects child windows by using EnumChildWindow().
The tooltip or context menu of the child window still cannot be detected after
this change. See bug for details.
Bug: webrtc:8062
Change-Id: I8455a9206d6a1d9da61013ac9debba4d3edae7d8
Reviewed-on: https://chromium-review.googlesource.com/619728
Commit-Queue: Zijie He <zijiehe@chromium.org>
Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#19457}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: f9d7eca9b0e759d8289cd37598e817528cc2602b3 files changed
