DevTools: Add $0 and $_ to autocomplete
DevTools: Add $0 and $_ to autocomplete

Change-Id: I232a60e72b500fce1e995231d79a2a32313fd58e
Reviewed-on: https://chromium-review.googlesource.com/c/1392174
Reviewed-by: Dmitry Gozman <0ca14b32cbb359a30ac562af27dd84cc2813eacb@chromium.org>
Commit-Queue: Joel Einbinder <bab755abe9fee48fe544272e55f73517d4e4a725@chromium.org>
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#619856}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 4861a63889bacf46e3724f57c3df98e99c4dad4e
ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend