Change initTouchEvent removal warning to M54

This CL updates TouchEvent.InitTouchEvent removal warning to M54
since we missed M53 branch point. (The original plan was to remove
in M53)

The Chrome Status Entry has also been updated to M54:
https://www.chromestatus.com/features/5730982598541312

BUG=629554

Review-Url: https://codereview.chromium.org/2158863002
Cr-Commit-Position: refs/heads/master@{#406350}
3 files changed