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>

1 files changed, 1 insertions, 1 deletions

diff --git a/DEPS b/DEPS
index 32e59c33a4..772af7ae90 100644
--- a/DEPS
+++ b/DEPS
@@ -18,7 +18,7 @@ vars = {
   'jinja2_revision': 'd34383206fa42d52faa10bb9931d6d538f3a57e0',
   'jpeg_turbo_revision': '7260e4d8b8e1e40b17f03fafdf1cd83296900f76',
   'markupsafe_revision': '8f45f5cfa0009d2a70589bcda0349b8cb2b72783',
-  'pdfium_tests_revision': '3fcb05df32dd74f46b1ce68c957c0452bce404c0',
+  'pdfium_tests_revision': 'ae1650f5459d720c866a8a4b74f58529f3efc4f1',
   'skia_revision': 'e0e20755f6c09b71038ced2bf4a00b4c4593f504',
   'tools_memory_revision': '427f10475e1a8d72424c29d00bf689122b738e5d',
   'trace_event_revision': '06294c8a4a6f744ef284cd63cfe54dbf61eea290',