Roll src/third_party/pdfium cf927b1f0823..b4c95fe2ded4 (5 commits)

https://pdfium.googlesource.com/pdfium.git/+log/cf927b1f0823..b4c95fe2ded4


git log cf927b1f0823..b4c95fe2ded4 --date=short --no-merges --format='%ad %ae %s'
2018-11-27 tsepez@chromium.org Rename WideString::{UTF8,UTF16LE}_Encode() to To{UTF8,UTF16LE}().
2018-11-27 tsepez@chromium.org Rename WideString::FromLocal() to FromDefANSI().
2018-11-27 tsepez@chromium.org XFA: Do not use UnownedPtr between CXFA_Nodes.
2018-11-27 tsepez@chromium.org Use checked downcasts between CFXA_LayoutItem and CXFA_FFWidget.
2018-11-26 tsepez@chromium.org Break circular dependence between {Byte,Wide}String


Created with:
  gclient setdep -r src/third_party/pdfium@b4c95fe2ded4

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:907427,chromium:907430
TBR=dsinclair@chromium.org

Change-Id: I25a82288ee6ebf33c7fad0e1688c1d416bb8dbff
Reviewed-on: https://chromium-review.googlesource.com/c/1351883Reviewed-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@{#611057}

DEPS

@@ -136,7 +136,7 @@ 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': 'cf927b1f0823b51a519fcec6f1919b092a58918e',
+  'pdfium_revision': 'b4c95fe2ded4695b9e5cf04fe2361c97424a50f5',
   # 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.