Revert "[Dark Web Contents]: Implement color inversion using CIELAB."

This reverts commit ca80dfd9caaba1a93c2ab9487f1aadcf32d81241.

Reason for revert: Causes Mac LayoutTest failures, details in https://crbug.com/959104

Bug: 959104

Original change's description:
> [Dark Web Contents]: Implement color inversion using CIELAB.
> 
> To invert color:
> 1. Tranform color to CIELab.
> 2. Invert the L and add 10.
> 3. Transform back to RGB.
> 
> Bug: 939312
> Change-Id: Iadeec2232afbe35cb189f0a36722392514db4781
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1547830
> Commit-Queue: Anna Malova <amalova@chromium.org>
> Reviewed-by: Tobias Sargeant <tobiasjs@chromium.org>
> Reviewed-by: Stephen Chenney <schenney@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#656195}

TBR=tobiasjs@chromium.org,schenney@chromium.org,amalova@chromium.org

Change-Id: I4b2602ccb012427f3efc285e2ad44777406fbe57
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 939312
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1591596
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#656323}
12 files changed