Currently, Ctrl-C while extracting browser might yield users in
a bad place.
This patch adds a marker file inside browser directory to make
sure that browser extraction completed.
Note: this was already attempted in #2489, but was eventually
reverted in #2534.
References #2660
We now commit protocol.ts files during the roll.
New utils/roll_browser.js helps with that.
This makes our installation very shallow:
- build installer;
- download browsers.
This reverts 2 commits:
- "fix(installer): create tmp directory inside `browserPath` (#2498)"
commit 946b4efa3b55dd96396b1c34f1f159735beaaaea.
- "feat: support atomic installation of browsers (#2489)"
commit 3de0c087bcc2592ae9fa65a79a29129e2b153e06.
This addresses installation issues we see in some CI environments.
