Roll PDFium from 9f35145a1ed0 to 4ae21d7942e1 (6 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/9f35145a1ed0..4ae21d7942e1

2020-05-21 thestig@chromium.org Add a pixel test to show incorrect pattern rendering.
2020-05-21 thestig@chromium.org Add a presubmit check for AUTHORS.
2020-05-21 thestig@chromium.org Make presubmit scripts more consistent with Chromium's.
2020-05-19 tsepez@chromium.org Give some members better names in fxcrt.
2020-05-19 thestig@chromium.org Sync AUTHORS file format with Chromium's.
2020-05-19 thestig@chromium.org Update third_party/base/numerics/

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/pdfium-autoroll
Please CC pdfium-deps-rolls@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://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

Bug: chromium:1015233
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: Iad5406db413ecc1876ac93f48e078d01ddb1d3a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2213019Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#771284}

DEPS

@@ -198,7 +198,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.
-  'pdfium_revision': '9f35145a1ed0fce39c61a8bcca5f2ab5117f6e86',
+  'pdfium_revision': '4ae21d7942e1b2e21aa791edf3611b7ecaa9aca9',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.