Roll src/third_party/pdfium/ cfb856c47..6b71f2209 (3 commits).

Roll src/third_party/pdfium/ cfb856c47..6b71f2209 (3 commits).

https://pdfium.googlesource.com/pdfium.git/+log/cfb856c4744a..6b71f22093fc

$ git log cfb856c47..6b71f2209 --date=short --no-merges --format='%ad %ae %s'
2017-01-16 npm Return early when gif_img_row_bytes is 0
2017-01-16 npm Check blue,green,red bit count in bmp_decode_rgb
2017-01-16 dsinclair Replace remaining CSS interfaces with concrete classes

BUG=681170, 668822
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

[pdfium-deps-roller, 2017-01-16 22:27:32]

The CQ bit was checked by pdfium-deps-roller@chromium.org

[commit-bot: I haz the power, 2017-01-16 22:27:47]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-16 23:31:25]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484605652074310, "parent_rev":
"e2dafbf4760e826f18b0c16b3976a667fcacf8a0", "commit_rev":
"b6440ca0b40a1c7065309bd6dafeaf535068020b"}

[commit-bot: I haz the power, 2017-01-16 23:37:31]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-16 23:37:32]

Prior attempt to commit was detected, but we were not able to check whether the
issue was successfully committed. Please check Git history manually and re-check
CQ or close this issue as needed.

[pdfium-deps-roller, 2017-01-16 23:38:59]

Commit queue failed; closing this roll.