Roll src/third_party/pdfium f57843cb20ee..0f4ac587a4ae (4 commits)

https://pdfium.googlesource.com/pdfium.git/+log/f57843cb20ee..0f4ac587a4ae

git log f57843cb20ee..0f4ac587a4ae --date=short --no-merges --format='%ad %ae %s'
2019-09-26 iapres@microsoft.com New API to retrieve a character's loose bounds
2019-09-26 thestig@chromium.org Roll third_party/freetype/src/ 99f23d6ff..432efa25b (5 commits)
2019-09-26 thestig@chromium.org Move a function into the anonymous namespace in fpdf_transformpage.cpp.
2019-09-25 awscreen@chromium.org [lcms] Clusterfuzz - avoid integer overflow

Created with:
  gclient setdep -r src/third_party/pdfium@0f4ac587a4ae

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:985604,chromium:997463
Change-Id: Ic35c3206caa8f7e27cd81ecdf05ef0f47bfac258
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1827494Reviewed-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@{#700454}

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': 'f57843cb20ee8d7c38513d9a26ff5df54d796c7a',
+  'pdfium_revision': '0f4ac587a4ae4717a414d2b359085e9126b93a84',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.