Roll libpng from 7e1f7e7b1063 to 1db23788f5aa (1 revision)

https://chromium.googlesource.com/chromium/src/third_party/libpng.git/+log/7e1f7e7b1063..1db23788f5aa

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/libpng-pdfium
Please CC pdfium-reviews+autoroller@googlegroups.com,thestig@chromium.org on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: pdfium-reviews+autoroller@googlegroups.com
Change-Id: I6c89da8b5c032f4b845d0bcf47aa0adfe6e0aeb1
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/113572
Commit-Queue: pdfium-autoroll <pdfium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: pdfium-autoroll <pdfium-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 2320a08..5f9e5f0 100644
--- a/DEPS
+++ b/DEPS
@@ -150,7 +150,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libpng
   # and whatever else without interference from each other.
-  'libpng_revision': '7e1f7e7b1063fd5f64ee1115186bb85791a5c00e',
+  'libpng_revision': '1db23788f5aa2c9f4e67bd56267a213014dd040b',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libunwind
   # and whatever else without interference from each other.