Roll src/third_party/pdfium/ a827770fa..0ddd5dc79 (5 commits)

https://pdfium.googlesource.com/pdfium.git/+log/a827770faf5c..0ddd5dc79696

$ git log a827770fa..0ddd5dc79 --date=short --no-merges --format='%ad %ae %s'
2017-12-04 thestig Break out CFX_ImageTransformer color calculations.
2017-12-04 thestig Break out CFX_ImageTransformer mono calculations.
2017-12-04 thestig Add text unit to glyph unit conversion to CPDF_Type3Char.
2017-12-04 dsinclair Cleanup CFXJSE_Engine visibility
2017-12-04 thestig Break out CFX_ImageTransformer alpha calculations.

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: I54e1022620bd0ae0b899c038bb5455bec07ead5c
Reviewed-on: https://chromium-review.googlesource.com/806431
Reviewed-by: <pdfium-deps-roller@chromium.org>
Commit-Queue: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521424}

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': 'a827770faf5c3cfb157d59d401134e986dc4a18d',
+  'pdfium_revision': '0ddd5dc7969676f0c661c859512be50e379a2260',
   # 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.