tree b9010f0608f7b1ba3f99a6eb3caae9cb293c6831
parent 40dc6aca101cf32e63ca74b3bc401c771ce95cf3
author Jamie Walch <jamiewalch@chromium.org> 1579306861 -0800
committer Commit Bot <commit-bot@chromium.org> 1579310902 +0000

Make MouseCursorMonitor optional for DesktopAndCursorComposer.

DesktopAndCursorComposer already handles a null MouseCursorMonitor. This
CL allows that code-path to be utilized by callers that already have a
MouseCursorMonitor, allowing its callbacks to be re-used by this class.
This is more efficient, and works around an apparent X Server deadlock
on Linux if multiple MouseCursorMonitors are simultaneously active.

The intended use-case for this is to allow the host-side cursor to be
composited into the desktop image if mouse-lock is active at the client.

Bug: chromium:1043325
Change-Id: I7e036850dd8c17fe55e57db252392062a847d10f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/166581
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Commit-Queue: Jamie Walch <jamiewalch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#30312}