This change reduces cases where capturing a window with the cropping
capturer captures unrelated windows from the same process. For instance:
- Capturing an Explorer window could include portions of taskbar UI,
e.g. when an auto-hide taskbar or window preview thumbnails are shown
overtop.
- Capturing a window from a process with multiple windows could include
menus/tooltips from another window.
Instead of capturing any window with an empty/matching title created by
the same process, the cropping capturer will capture any window created
by the same thread. While not foolproof, this heuristic seems to capture
menus/tooltips from the window of interest while excluding those from
other top-level windows in practice (assuming those were created by a
separate thread / independent message pump).
Bug: webrtc:10856
Change-Id: I2072c79da9e0158475b442a43b5b96d6ad307bc2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/148641
Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Commit-Queue: Jamie Walch <jamiewalch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#28824}
1544915bb4