Roll src/third_party/pdfium 1afa8b609752..96befae82483 (4 commits)

https://pdfium.googlesource.com/pdfium.git/+log/1afa8b609752..96befae82483

git log 1afa8b609752..96befae82483 --date=short --no-merges --format='%ad %ae %s'
2019-11-12 thestig@chromium.org Switch to C++14 by default.
2019-11-12 thestig@chromium.org Roll v8/ 9ddd0c4c1..a423bb8be (1234 commits)
2019-11-12 thestig@chromium.org Fix crash in FPDFPageObj_GetFillColor().
2019-11-12 thestig@chromium.org Add another test for FPDFText_GetFontWeight().

Created with:
  gclient setdep -r src/third_party/pdfium@96befae82483

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

TBR=pdfium-deps-rolls@chromium.org

Bug: None
Change-Id: Iac0e17c837d59966510891e712d0f50a46b29fe8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913546Reviewed-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@{#714773}

DEPS

@@ -188,7 +188,7 @@ 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': '1afa8b6097521b67fc3f6ad576581d836e37e050',
+  'pdfium_revision': '96befae824837fbad3f164c602961756c7b0b1db',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.