Roll src/third_party/pdfium ce0eecb10b14..aea4bca2621b (7 commits)

https://pdfium.googlesource.com/pdfium.git/+log/ce0eecb10b14..aea4bca2621b

git log ce0eecb10b14..aea4bca2621b --date=short --no-merges --format='%ad %ae %s'
2019-08-27 thestig@chromium.org Prevent another integer overflow in AGG.
2019-08-27 thestig@chromium.org Roll build/ 315a0c669..e7232efeb (1 commit)
2019-08-27 thestig@chromium.org Remove a memset() in CFDE_TextEditEngine::RebuildPieces().
2019-08-27 thestig@chromium.org Reformat listbox_form.in to be more consistent with other .in files.
2019-08-27 thestig@chromium.org Redo a UBSAN fix in AGG.
2019-08-26 thestig@chromium.org Roll third_party/freetype/src/ 7d1d3b9a0..9adc3b35f (1 commit)
2019-08-26 thestig@chromium.org Roll third_party/freetype/src/ 12af46b64..7d1d3b9a0 (3 commits)

Created with:
  gclient setdep -r src/third_party/pdfium@aea4bca2621b

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:997021
Change-Id: Ieff2f4f2754be5d200e739a456c5d4f91668c8b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1769689Reviewed-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@{#690927}

DEPS

@@ -182,7 +182,7 @@ 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': 'ce0eecb10b14db2bd0b55a58c5dbf8f034110d5a',
+  'pdfium_revision': 'aea4bca2621bf6c614b9c4c606c4c06e5a968d03',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.