Roll src/third_party/pdfium/ dbac8ca4f..bc4869293 (3 commits)

https://pdfium.googlesource.com/pdfium.git/+log/dbac8ca4f5d7..bc4869293d78

$ git log dbac8ca4f..bc4869293 --date=short --no-merges --format='%ad %ae %s'
2018-01-29 thestig Fix identical if/else blocks.
2018-01-29 thestig Remove duplicate assignments in sycc420_to_rgb().
2018-01-29 thestig Roll V8 to ee5d9a0c.

Created with:
  roll-dep src/third_party/pdfium
BUG=805881,805881


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: Id658b85157c1332418f1509c8653ecab8390cfae
Reviewed-on: https://chromium-review.googlesource.com/890631
Commit-Queue: <pdfium-deps-roller@chromium.org>
Reviewed-by: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532498}

DEPS

@@ -107,7 +107,7 @@ 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': 'dbac8ca4f5d70195b0d8d6b7a0f042efb8e45574',
+  'pdfium_revision': 'bc4869293d7869c06e3f8c18241447ec5b701b58',
   # 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.