Roll PDFium from 184443e8d779 to 82b1c03b6876 (11 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/184443e8d779..82b1c03b6876

2020-08-27 thestig@chromium.org Make cpdf_interactiveform.cpp ordering better match header.
2020-08-27 thestig@chromium.org Remove more dead code in cpdf_interactiveform.cpp.
2020-08-27 thestig@chromium.org Shuffle code in cpdf_interactiveform.cpp.
2020-08-27 thestig@chromium.org Pack CFX_FillRenderOptions tighter.
2020-08-27 tsepez@chromium.org Remove std::move() in xfa/fxfa/layout missed in GC conversion.
2020-08-27 tsepez@chromium.org Add move-assign tests for cppgc::Member<> and cppgc::Persistent<>.
2020-08-26 thestig@chromium.org Make CFX_FillRenderOptions construction constexpr.
2020-08-26 thestig@chromium.org Make CFX_TextRenderOptions construction constexpr.
2020-08-26 thestig@chromium.org Remove dead code in cpdf_interactiveform.cpp.
2020-08-26 thestig@chromium.org Move CPDF_InteractiveForm::AddNativeFont() to an anonymous namespace.
2020-08-26 thestig@chromium.org Simplify AddStandardFont().

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/+doc/master/autoroll/README.md

Bug: None
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: I79f82bc47f97bdb6e033aedc1b7d1717b9e98fd4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2378825Reviewed-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@{#802128}

DEPS

@@ -215,7 +215,7 @@ 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': '184443e8d77994d568436a2213e1d12e433d73b4',
+  'pdfium_revision': '82b1c03b687687f98916b4f439b576d03bb99965',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.