Remove self from cast and tab capture watchlists.

TBR=wez

Bug: 
Change-Id: I3016dea4130a0020158cb5d0ff610b6c4fa19268
Reviewed-on: https://chromium-review.googlesource.com/541897
Reviewed-by: mark a. foltz <[email protected]>
Commit-Queue: mark a. foltz <[email protected]>
Cr-Commit-Position: refs/heads/master@{#481034}
1 file changed