Roll src/third_party/pdfium/ 8509d3eae..c5bfeec86 (1 commit)

https://pdfium.googlesource.com/pdfium.git/+log/8509d3eaec1b..c5bfeec86aa7

$ git log 8509d3eae..c5bfeec86 --date=short --no-merges --format='%ad %ae %s'
2017-12-04 thestig Add functions for common code in CFX_ImageTransformer.

Created with:
  roll-dep src/third_party/pdfium


The AutoRoll server is located here: https://pdfium-roll.skia.org

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.


TBR=dsinclair@chromium.org

Change-Id: I64e311ac738a97512495998c177e0f31d1800291
Reviewed-on: https://chromium-review.googlesource.com/806434
Reviewed-by: <pdfium-deps-roller@chromium.org>
Commit-Queue: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521345}

DEPS

@@ -98,7 +98,7 @@ 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': '8509d3eaec1b2fac27a24de7bc586ad12b7bb178',
+  'pdfium_revision': 'c5bfeec86aa70c2ec573c183bd3a8390a3d903e6',
   # 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.