Roll src/third_party/pdfium/ adee4859c..78616574c (1 commit)

https://pdfium.googlesource.com/pdfium.git/+log/adee4859cdb4..78616574cedc

$ git log adee4859c..78616574c --date=short --no-merges --format='%ad %ae %s'
2017-03-16 thestig Coalesce redundant path points.

Created with:
  roll-dep src/third_party/pdfium
BUG=679353

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

Review-Url: https://codereview.chromium.org/2750173009
Cr-Commit-Position: refs/heads/master@{#457804}

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': 'adee4859cdb4a591cdc202d0a4452d17a827fc90',
+  'pdfium_revision': '78616574cedcb52cce8a25bd684bf9638a87de7a',
   # 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.