Roll src/third_party/pdfium 8cb6a652ad24..3567a9a85896 (4 commits)

https://pdfium.googlesource.com/pdfium.git/+log/8cb6a652ad24..3567a9a85896

git log 8cb6a652ad24..3567a9a85896 --date=short --first-parent --format='%ad %ae %s'
2019-12-18 thestig@chromium.org Roll third_party/depot_tools/ fe18a43d5..603782044 (20 commits; 3 trivial rolls)
2019-12-18 thestig@chromium.org Avoid crash in CPDF_SecurityHandler::GetUserPassword().
2019-12-18 tsepez@chromium.org Unify FPDF_FORMFILLINFO versioning and mark V2 as experimental
2019-12-18 dhoss@chromium.org Add --disable-javascript flag to test_runner.py

Created with:
  gclient setdep -r src/third_party/pdfium@3567a9a85896

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/+/master/autoroll/README.md

Bug: None
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: Icabc3e679d59004acfd783a8be4b70793cbd44d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1974592Reviewed-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@{#726159}

DEPS

@@ -195,7 +195,7 @@ 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': '8cb6a652ad24ac7c4fc84170c976ce701ba8880e',
+  'pdfium_revision': '3567a9a85896c8d052edb2652b9028116affab85',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.