Roll src/third_party/pdfium b2d0ebdef207..8f877b2e3820 (3 commits)

https://pdfium.googlesource.com/pdfium.git/+log/b2d0ebdef207..8f877b2e3820


git log b2d0ebdef207..8f877b2e3820 --date=short --no-merges --format='%ad %ae %s'
2019-05-13 tsepez@chromium.org Replace CountedFaceCache with RetainPtr<CFX_FaceCache>
2019-05-13 tsepez@chromium.org Rename CXFA_Node::RemoveChild() to RemoveChildAndNotify()
2019-05-13 tsepez@chromium.org Add more helper methods to tree_node.h


Created with:
  gclient setdep -r src/third_party/pdfium@8f877b2e3820

The AutoRoll server is located here: https://autoroll.skia.org/r/pdfium-autoroll

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=pdfium-deps-rolls@chromium.org

Change-Id: I49b6e97604e451bff16fa78806332f3f6cf78d2a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1610783Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#659301}

DEPS

@@ -153,7 +153,7 @@ 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': 'b2d0ebdef20754fe209bacd391db0df27f6e08f1',
+  'pdfium_revision': '8f877b2e382051fcff0de8bcce0b47c8a0d55dd3',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.