Roll src/third_party/pdfium/ 3ae75c2f2..5098b2528 (4 commits)

https://pdfium.googlesource.com/pdfium.git/+log/3ae75c2f2e57..5098b2528487

$ git log 3ae75c2f2..5098b2528 --date=short --no-merges --format='%ad %ae %s'
2018-03-26 hnakashima Reland "Add FPDFAnnot_CountAttachmentPoints"
2018-03-26 hnakashima Revert "Add FPDFAnnot_CountAttachmentPoints"
2018-03-26 hnakashima Do not call CPDF_PageObjectList directly in fpdfeditpage.cpp.
2018-03-26 ralf.sippl Add FPDFAnnot_CountAttachmentPoints

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: I05345a1c5c32ead266cf8b49a6e24a6e162059bb
Reviewed-on: https://chromium-review.googlesource.com/981447Reviewed-by: pdfium-chromium-autoroll <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: pdfium-chromium-autoroll <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#545970}

DEPS

@@ -103,7 +103,7 @@ 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': '3ae75c2f2e5759fcf8218e59fa380c26b98aa6b6',
+  'pdfium_revision': '5098b252848734ac69e0851f7bd116d93311a57e',
   # 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.