Roll src/third_party/pdfium 4efdb5120090..ac0f524bb103 (6 commits)

https://pdfium.googlesource.com/pdfium.git/+log/4efdb5120090..ac0f524bb103


git log 4efdb5120090..ac0f524bb103 --date=short --no-merges --format='%ad %ae %s'
2019-02-26 thestig@chromium.org Optimize FindSubWordLength().
2019-02-26 thestig@chromium.org Avoid some WideString construction inside FX_ParseDateUsingFormat().
2019-02-26 thestig@chromium.org Save results from FPDF_GetFieldAttr() calls.
2019-02-26 thestig@chromium.org Add constants for form field types.
2019-02-26 thestig@chromium.org Add constants for common form field dictionary entries.
2019-02-26 thestig@chromium.org Simplify CheckForUnsupportedAnnot() internals.


Created with:
  gclient setdep -r src/third_party/pdfium@ac0f524bb103

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.



BUG=chromium:935241,chromium:935241
TBR=dsinclair@chromium.org

Change-Id: Ic3b21fbfc95ebcdbe9089dae9b7a8a401ad2f81e
Reviewed-on: https://chromium-review.googlesource.com/c/1490372Reviewed-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@{#635784}

DEPS

@@ -147,7 +147,7 @@ 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': '4efdb51200909b6b878a120bbde394f1bd716ab6',
+  'pdfium_revision': 'ac0f524bb10359d2d152b2001bc33e5bdc212c49',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling openmax_dl
   # and whatever else without interference from each other.