Roll src/third_party/pdfium/ b8a8c43f3..e8c1d4144 (2 commits)

https://pdfium.googlesource.com/pdfium.git/+log/b8a8c43f3942..e8c1d4144e84

$ git log b8a8c43f3..e8c1d4144 --date=short --no-merges --format='%ad %ae %s'
2017-05-04 thestig Give a couple of char to int functions better names.
2017-05-04 thestig Reduce 1D barcode DrawPath calls.

Created with:
  roll-dep src/third_party/pdfium


Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


TBR=dsinclair@chromium.org

Change-Id: I0f31d35b9bebe501f81431b5bb0a94e9c91c6509
Reviewed-on: https://chromium-review.googlesource.com/497006
Reviewed-by: <pdfium-deps-roller@chromium.org>
Commit-Queue: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#469536}

DEPS

@@ -64,7 +64,7 @@ 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': 'b8a8c43f394277d1f87320a4f01b4d5c38e81113',
+  'pdfium_revision': 'e8c1d4144e8407c0631116a954fa347dd39375ff',
   # 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.