This reverts commit 2d8ad76070a840ce3821f3d28e55cd952f7640c0.
Reason for revert: Grouping would break alphabetical sort, which is controversial.
Original change's description:
> DevTools: prepare Computed sidebar for groups
>
> Computed sidebar
> - Removes even/odd striping
> - Extracts a function to build a property's TreeElement
>
> Bug: 929536
> Change-Id: I727cf1efa5ac65277a046b52575f35102323c38f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1548446
> Reviewed-by: Joey Arhar <jarhar@chromium.org>
> Commit-Queue: Erik Luo <luoe@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#648029}
TBR=luoe@chromium.org,jarhar@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: 929536
Change-Id: Icec233a91c07b2b864830df6419690911070101a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1565380
Reviewed-by: Erik Luo <luoe@chromium.org>
Commit-Queue: Erik Luo <luoe@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#650149}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 37893dee61d4f8d4a23c0d23bd36dbd4ef6d893c