SMask emulation
Remove unused file from Chromium extension

extensions/chromium/patch-worker.js was already redundant
since edd4bae903c36048b7d4d4bed393e4408d0198ba.
Merge pull request #4173 from Rob--W/crx-remove-unused-file

Remove unused file from Chromium extension
Merge pull request #4161 from yurydelendik/smask

SMask emulation