Roll PDFium from 4ae21d7942e1 to f32ae562fe52 (4 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/4ae21d7942e1..f32ae562fe52

2020-05-29 tsepez@chromium.org Merge INT_MAX % -1 patch to pdfium
2020-05-29 hikakar@microsoft.com Fix enter/space key press events on Combobox
2020-05-29 hikakar@microsoft.com Handle Enter/Space key events for read-only check box and radio button.
2020-05-29 nigi@chromium.org Add a helper function for creating text rendering options.

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: chromium:1086092
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: Ied1e8acf92a220986c7a51e498eb1d8fbc9fe536
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2222120Reviewed-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@{#773051}

DEPS

@@ -198,7 +198,7 @@ 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': '4ae21d7942e1b2e21aa791edf3611b7ecaa9aca9',
+  'pdfium_revision': 'f32ae562fe522ba1ac55b33ae4efe15ca98f58fc',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.