Roll src/third_party/pdfium d9bd62fafb66..0844b9a3b625 (3 commits)

https://pdfium.googlesource.com/pdfium.git/+log/d9bd62fafb66..0844b9a3b625

git log d9bd62fafb66..0844b9a3b625 --date=short --first-parent --format='%ad %ae %s'
2020-02-12 thestig@chromium.org Prevent destruction of CXFA_FFWidget across FWL events.
2020-02-12 tsepez@chromium.org Add test case for PDF password annotations
2020-02-12 aadhir@microsoft.com Sending focused annotation update to the host

Created with:
  gclient setdep -r src/third_party/pdfium@0844b9a3b625

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: chromium:1003501,chromium:1039629,chromium:989027
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: I769609126ada35d6238d4f6d756ea4b5a126c5ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2052095Reviewed-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@{#740821}

DEPS

@@ -191,7 +191,7 @@ 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': 'd9bd62fafb662f5dce8bf36bb61d4d0e5b263496',
+  'pdfium_revision': '0844b9a3b6259ff2af9e77425aa4bd3dcf71d861',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.