Roll src/third_party/pdfium 4935770daa8e..9bf01811ac13 (2 commits)

https://pdfium.googlesource.com/pdfium.git/+log/4935770daa8e..9bf01811ac13

git log 4935770daa8e..9bf01811ac13 --date=short --no-merges --format='%ad %ae %s'
2019-08-19 tsepez@chromium.org Remove some more CPDFXFA_* type usage from fpdfsdk/cpdfsdk_*
2019-08-19 thestig@chromium.org Simplify CPDF_ToUnicodeMap::Lookup().

Created with:
  gclient setdep -r src/third_party/pdfium@9bf01811ac13

The AutoRoll server is located here: https://autoroll.skia.org/r/pdfium-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=pdfium-deps-rolls@chromium.org

Bug: None
Change-Id: Ifc2ce8d6a5cd679fcf5a1e0ca286fc5da6d6f3e7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1761218Reviewed-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@{#688271}

DEPS

@@ -165,7 +165,7 @@ 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': '4935770daa8e301c12f4e5d021b6124fc96dc28c',
+  'pdfium_revision': '9bf01811ac13f623224a8756bfc03c56016e8a5a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.