GitLab

When pressing an accelerator, the user may release the modifier key first.
e.g. press Ctrl, press A, release Ctrl, release A
This CL prevents the cursor from being hidden in this scenario.

BUG=454902
TEST=WindowManagerTest.UpdateCursorVisibilityAccelerator

Review URL: https://codereview.chromium.org/960073002

Cr-Commit-Position: refs/heads/master@{#319885}