Roll src/third_party/pdfium 024cbe1befe1..391d4f3130da (2 commits)

https://pdfium.googlesource.com/pdfium.git/+log/024cbe1befe1..391d4f3130da

git log 024cbe1befe1..391d4f3130da --date=short --first-parent --format='%ad %ae %s'
2019-12-04 tsepez@chromium.org Remove #ifdef around right-button methods in fpdf_view_c_api_test.c
2019-12-04 tsepez@chromium.org Expose FORM_OnRButton{Down,Up} to non-XFA builds

Created with:
  gclient setdep -r src/third_party/pdfium@391d4f3130da

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: Ia43b81e53d114f53b60cd6bff59b29a24c99fbd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1951656Reviewed-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@{#721717}

DEPS

@@ -192,7 +192,7 @@ 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': '024cbe1befe1dfbc4d330f790b92ac3da011a0a8',
+  'pdfium_revision': '391d4f3130dad802cd344a3461c8a5cb35bbcf59',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.