Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.

Automatically assigning owner based on suspected regression changelist https://pdfium.googlesource.com/pdfium/+/db0312e6acd7cc15fef0f64e05bd463cb74c70e4 (Move CXFA_PDFFontMgr to CFGAS_PDFFontMgr).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.

https://pdfium-review.googlesource.com/c/pdfium/+/32052

The following revision refers to this bug:
  https://pdfium.googlesource.com/pdfium/+/c3f62db21878c8adc60beae5f534218b417daa40

commit c3f62db21878c8adc60beae5f534218b417daa40
Author: Dan Sinclair <dsinclair@chromium.org>
Date: Thu May 03 18:27:12 2018

[xfa] Verify we can get a font manager before setting up XFA

When setting up an XFA document we need to create a font manager. That
font manager requires the CFGAS_FontMgr to be provided, and ASSERTs to
that fact. It's possible for the CFGAS_FontMgr to be nullptr if we fail
to enumerate the system fonts.

This CL verifys we can get the needed manager and fails out of the XFA
OpenDoc method if we have no font manager.

Bug:  chromium:835693 
Change-Id: I806f265075dcc355e0a7aeb4b3ae8eb950aa5eee
Reviewed-on: https://pdfium-review.googlesource.com/32052
Commit-Queue: dsinclair <dsinclair@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

[modify] https://crrev.com/c3f62db21878c8adc60beae5f534218b417daa40/xfa/fxfa/cxfa_ffdoc.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5cee59c3852ed3c5e078ae0c23fce23a77983bcb

commit 5cee59c3852ed3c5e078ae0c23fce23a77983bcb
Author: pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Date: Fri May 04 01:01:19 2018

Roll src/third_party/pdfium/ 525147a1f..ad1788557 (5 commits)

https://pdfium.googlesource.com/pdfium.git/+log/525147a1f6d6..ad178855775d

$ git log 525147a1f..ad1788557 --date=short --no-merges --format='%ad %ae %s'
2018-05-03 rharrison Invalidate GIF input buffer when moving file cursor backwards
2018-05-03 tsepez Prove that the memory was good at FPDFBitmap_CreateEx() create time.
2018-05-03 hnakashima Use pointers instead of refs in CXFA_TextLayout params.
2018-05-03 dsinclair [xfa] Verify we can get a font manager before setting up XFA
2018-05-03 dsinclair [xfa] Verify field count before accessing

Created with:
  roll-dep src/third_party/pdfium
BUG= chromium:839348 , chromium:839361 , chromium:838886 , chromium:835693 , chromium:837585 


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: I06ec60f0a34b13f864be053ffe512402c4c8ad7a
Reviewed-on: https://chromium-review.googlesource.com/1043278
Reviewed-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@{#555941}
[modify] https://crrev.com/5cee59c3852ed3c5e078ae0c23fce23a77983bcb/DEPS