Revert "Revert "Reland "Remove ContrastAdjust()."""chromium/3253chromium/3252

This reverts commit 978ba20ffd0d2b37bf02b9d86828fa701c0c02fa.

Reason for revert: I now have the new expected files for the
chrome test ready in
https://chromium-review.googlesource.com/c/chromium/src/+/742061
Landing this again and will immediately add a manual pdfium roll to
cl 742061 to unblock the deps roller.

Original change's description:
> Revert "Reland "Remove ContrastAdjust().""
> 
> This reverts commit d5ec7ab0cd0663184d6056bc6fc87c86ec345342.
> 
> Reason for revert: Did not mean to reland, just create the reland CL.
> 
> Original change's description:
> > Reland "Remove ContrastAdjust()."
> > 
> > Original change's description:
> > > Revert "Remove ContrastAdjust()."
> > > 
> > > This reverts commit 53d443f042b590ae2d920def16bc9daf66f8427d.
> > > 
> > > Reason for revert: Breaks PDFToPWGRasterBrowserTest
> > > 
> > > Original change's description:
> > > > Remove ContrastAdjust().
> > > > 
> > > > This post-processing increased the contrast of scaled-down features -
> > > > mainly lines and fonts, relative to the background. The effect does not
> > > > improved readability and in some cases makes the scaled-down version
> > > > look like a different document at a glance. Text that is normal
> > > > weight appears bold when scaled down in these cases.
> > > > 
> > > > Change-Id: I2544d45e2bcec25d6742d2a60c1316d8df08cce1
> > > > Reviewed-on: https://pdfium-review.googlesource.com/15471
> > > > Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
> > > > Reviewed-by: dsinclair <dsinclair@chromium.org>
> > > 
> > > TBR=bungeman@chromium.org,dsinclair@chromium.org,hnakashima@chromium.org
> > > 
> > > # Not skipping CQ checks because original CL landed > 1 day ago.
> > > 
> > > Change-Id: I7f61650bc6d917b3c6640da60f3f740ef4498de0
> > > Reviewed-on: https://pdfium-review.googlesource.com/16970
> > > Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
> > > Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
> > 
> > TBR=bungeman@chromium.org,dsinclair@chromium.org,hnakashima@chromium.org
> > 
> > Change-Id: I77d4377d30908d1e2d4dc842300a761072a5fbd4
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Reviewed-on: https://pdfium-review.googlesource.com/16990
> > Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
> > Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
> 
> TBR=bungeman@chromium.org,dsinclair@chromium.org,hnakashima@chromium.org
> 
> Change-Id: Ie2e91662a1e82c0a793952aab47c2acbde1596d4
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://pdfium-review.googlesource.com/16991
> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>

TBR=bungeman@chromium.org,dsinclair@chromium.org,hnakashima@chromium.org

Change-Id: Iaae451131043ee69052809680922fdac06a69458
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://pdfium-review.googlesource.com/16992
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>

1 files changed, 0 insertions, 0 deletions

diff --git a/testing/resources/pixel/bug_543018_2_expected.pdf.0.png b/testing/resources/pixel/bug_543018_2_expected.pdf.0.png
index 7d1b89aedb..eabf957375 100644
--- a/testing/resources/pixel/bug_543018_2_expected.pdf.0.png
+++ b/testing/resources/pixel/bug_543018_2_expected.pdf.0.png