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>

2 files changed, 4 insertions, 4 deletions

diff --git a/core/fpdfapi/parser/cpdf_security_handler_embeddertest.cpp b/core/fpdfapi/parser/cpdf_security_handler_embeddertest.cpp
index 3770e98d86..91e625ab26 100644
--- a/core/fpdfapi/parser/cpdf_security_handler_embeddertest.cpp
+++ b/core/fpdfapi/parser/cpdf_security_handler_embeddertest.cpp
@@ -43,11 +43,11 @@ TEST_F(CPDFSecurityHandlerEmbeddertest, OwnerPassword) {
 
 TEST_F(CPDFSecurityHandlerEmbeddertest, PasswordAfterGenerateSave) {
 #if _FX_PLATFORM_ == _FX_PLATFORM_LINUX_
-  const char md5[] = "e4a3701ca5b2a759e06455aa8d97d46e";
+  const char md5[] = "7048dca58e2ed8f93339008b91e4eb4e";
 #elif _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
   const char md5[] = "6951b6c9891dfe0332a5b1983e484400";
 #else
-  const char md5[] = "50985f3440d3f66c3b599ab138214015";
+  const char md5[] = "a5dde3c6c37b8716b9b369a03752a728";
 #endif  // _FX_PLATFORM_ == _FX_PLATFORM_LINUX_
   {
     ASSERT_TRUE(OpenDocument("encrypted.pdf", "5678", true));
diff --git a/core/fpdfapi/parser/fpdf_parser_decode_embeddertest.cpp b/core/fpdfapi/parser/fpdf_parser_decode_embeddertest.cpp
index bb186924b6..bf2fd6d10f 100644
--- a/core/fpdfapi/parser/fpdf_parser_decode_embeddertest.cpp
+++ b/core/fpdfapi/parser/fpdf_parser_decode_embeddertest.cpp
@@ -115,9 +115,9 @@ TEST_F(FPDFParserDecodeEmbeddertest, Bug_455199) {
 #if _FX_PLATFORM_ == _FX_PLATFORM_APPLE_
   const char kExpectedMd5sum[] = "b90475ca64d1348c3bf5e2b77ad9187a";
 #elif _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_
-  const char kExpectedMd5sum[] = "9a2637b73fd5265309bfddd9c69476cd";
+  const char kExpectedMd5sum[] = "e5a6fa28298db07484cd922f3e210c88";
 #else
-  const char kExpectedMd5sum[] = "f7e129d97c58e91adeace32a4327b925";
+  const char kExpectedMd5sum[] = "2baa4c0e1758deba1b9c908e1fbd04ed";
 #endif
   CompareBitmap(bitmap, 200, 200, kExpectedMd5sum);
   FPDFBitmap_Destroy(bitmap);