Roll src/third_party/pdfium 96befae82483..d021c9f3296d (5 commits)

https://pdfium.googlesource.com/pdfium.git/+log/96befae82483..d021c9f3296d

git log 96befae82483..d021c9f3296d --date=short --no-merges --format='%ad %ae %s'
2019-11-15 thestig@chromium.org Make |CXFA_FFField::m_pNormalWidget| private.
2019-11-15 thestig@chromium.org Avoid more |CXFA_FFField::m_pNormalWidget| usage.
2019-11-15 thestig@chromium.org Use CXFA_FFField::GetNormalWidget() in more places.
2019-11-15 thestig@chromium.org Fix a crash in CXFA_FFComboBox::OpenDropDownList().
2019-11-14 thestig@chromium.org Fix nits in FPDFEditPathEmbedderTest.

Created with:
  gclient setdep -r src/third_party/pdfium@d021c9f3296d

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: chromium:996123
Change-Id: I9373090e2e0d7c41dfb6863016191d5f61e48469
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1920019Reviewed-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@{#715965}

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': '96befae824837fbad3f164c602961756c7b0b1db',
+  'pdfium_revision': 'd021c9f3296d11b40a2a37303dc36437844bdf27',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.