Created extension to allow GIF webcam uploads with comments

Review Request #9540 — Created Jan. 26, 2018 and discarded — Latest diff uploaded




This extension will allow users to capture short (3-5 second) videos of themselves, which are then encoded as animated GIFs client-side, and then uploaded and embedded into a comment on a code review.

The extension is now fully implemented for pop-over comments.

The gif.js library and worker (which are excluded from review) can be found here:
They should be placed in \static\js\lib\gif.js and \static\js\lib\gif.worker.js

Test comments were posted on dummy reviews
Tried canceling out of recording in both preview and recording states by clicking cancel, unchecking and rechecking Enable Markdown
Tested extension functions in Chrome, Edge, and Firefox