Yup, that is me. I am currently refactoring how that API works. I will fix it once https://pdfium-review.googlesource.com/c/pdfium/+/16210 has landed and the DEPS roll picks it up.

Thanks for the update Ryan. Is there any way we can speed up the fix? We have the Fuzzathon going on, and people are adding / improving fuzz targets, so we cannot just sit and wait with broken builds for a while :(

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7acf34ac83f7d3de53a32bad59fdcb5892db3ac9

commit 7acf34ac83f7d3de53a32bad59fdcb5892db3ac9
Author: Max Moroz <mmoroz@chromium.org>
Date: Wed Oct 18 02:12:45 2017

Temporary fix pdfium_xfa_fuzzer in order to unblock other fuzzing builds.

TBR=metzman@chromium.org, ochang@chromium.org, rharrison@chromium.org

Bug:  775615 
Change-Id: I2aaa15cfcde324974ca9352169aa595fc571f5e1
Reviewed-on: https://chromium-review.googlesource.com/724732
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#509655}
[modify] https://crrev.com/7acf34ac83f7d3de53a32bad59fdcb5892db3ac9/pdf/pdfium/fuzzers/pdfium_xfa_fuzzer.cc

Thanks for the patch Max, sorry about not handling this yesterday. I don't think I grok'd that this was blocking all the builds, I was thinking it was only blocking the XFA one.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/83f632ba6258bdecb6e6a5ef7d07d42ee6a7ebca

commit 83f632ba6258bdecb6e6a5ef7d07d42ee6a7ebca
Author: Ryan Harrison <rharrison@chromium.org>
Date: Wed Oct 18 19:37:28 2017

Change XFA fuzzer to use new API for detecting XFA forms

Includes a manual roll of PDFium in DEPS to 
854d71c1420eb80ec79755a6cdf829f3f39aead7, to pick up the new API.

BUG= chromium:775615 

Change-Id: I186a7f385eb50c59718dabc1407d49564cf3547a
Reviewed-on: https://chromium-review.googlesource.com/724021
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Cr-Commit-Position: refs/heads/master@{#509839}
[modify] https://crrev.com/83f632ba6258bdecb6e6a5ef7d07d42ee6a7ebca/DEPS
[modify] https://crrev.com/83f632ba6258bdecb6e6a5ef7d07d42ee6a7ebca/pdf/pdfium/fuzzers/pdfium_xfa_fuzzer.cc