Roll src/third_party/pdfium f3883e32a739..170f685582e1 (2 commits)

https://pdfium.googlesource.com/pdfium.git/+log/f3883e32a739..170f685582e1

git log f3883e32a739..170f685582e1 --date=short --first-parent --format='%ad %ae %s'
2019-12-06 kmoon@chromium.org Add utility for filter-encoding PDF streams
2019-12-06 patrik@pspdfkit.com Allow reading font name from Windows `name` table entry.

Created with:
  gclient setdep -r src/third_party/pdfium@170f685582e1

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: I15c3c786e6b81d1c17a27aa69951c8aaee3adfef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1956084Reviewed-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@{#722649}

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': 'f3883e32a739dfda868e82a65975adbe23f979d7',
+  'pdfium_revision': '170f685582e15de6472662f28f3dd90bf5b62eb2',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.