[LayoutNG] Remove devtools inspect color shifting for NG objects.

As above this is a partial revert of:
https://chromium-review.googlesource.com/c/chromium/src/+/1158391

(partial as LayoutObject::IsLayoutNGObject() is used elsewhere now).

Bug: 869866
Change-Id: I9e775fc484f004445a0a7d03cd899943dc5a07af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1611859
Commit-Queue: Joel Einbinder <einbinder@chromium.org>
Auto-Submit: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Joel Einbinder <einbinder@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659682}
1 file changed