GitLab

When paused in debugger on mouse move, we can send ack as it has
no side effects apart from new mouse moves being sent to renderer.

Debugger already causes nested input events handling (because of
different event types don't wait for each other's ack). This, and mouse
move being the event without side effects, means there should be
no harm in allowing nested mouse moves.

BUG=374183

Review URL: https://codereview.chromium.org/288393004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272230 0039d316-1c4b-4281-b951-d872f2087c98