Roll src/third_party/pdfium 651618043819..54eda5713da0 (4 commits)

https://pdfium.googlesource.com/pdfium.git/+log/651618043819..54eda5713da0

git log 651618043819..54eda5713da0 --date=short --no-merges --format='%ad %ae %s'
2019-10-29 tsepez@chromium.org Avoid duplicate string construction in CXFA_Textlayout
2019-10-29 thestig@chromium.org Properly handle seek failure in CFX_BmpDecompressor::ReadBmpHeader().
2019-10-29 thestig@chromium.org Get rid of longjmp() usage in CFX_BmpDecompressor.
2019-10-29 tsepez@chromium.org Use span instead of raw pointer in CFDE_TextOut::ReloadLinePiece().

Created with:
  gclient setdep -r src/third_party/pdfium@54eda5713da0

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:997588
Change-Id: I675fae4f2e95848681d80be2b2998a3adbccdbe6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1889253Reviewed-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@{#710635}

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': '65161804381915cdf3d536fa912bacfe62e4f353',
+  'pdfium_revision': '54eda5713da0908738c79021da5314b91fb773ae',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.