Roll src/third_party/pdfium d718d634b7aa..87c1fdcc9a56 (3 commits)

https://pdfium.googlesource.com/pdfium.git/+log/d718d634b7aa..87c1fdcc9a56


git log d718d634b7aa..87c1fdcc9a56 --date=short --no-merges --format='%ad %ae %s'
2018-07-30 tsepez@chromium.org Don't static_cast<>(this) to subclass in CXFA_LayoutItem methods.
2018-07-30 tsepez@chromium.org Return unique_ptr from CXFA_FFNotify::OnCreate{Container,Content}LayoutItem()
2018-07-30 tsepez@chromium.org Convert some asserts to ifs in cxfa_ffnotify.cpp.


Created with:
  gclient setdep -r src/third_party/pdfium@87c1fdcc9a56

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: Ib65f272f30b18482963afe5f468bdaff4fc40fe4
Reviewed-on: https://chromium-review.googlesource.com/1155613Reviewed-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@{#579230}

DEPS

@@ -129,7 +129,7 @@ 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': 'd718d634b7aa3311a5b6298574d06f091365259f',
+  'pdfium_revision': '87c1fdcc9a5669e29c4440e2b220587de7134e7a',
   # 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.