Roll src/third_party/pdfium 2d7cb9267899..8444b6a1bf03 (5 commits)

https://pdfium.googlesource.com/pdfium.git/+log/2d7cb9267899..8444b6a1bf03


git log 2d7cb9267899..8444b6a1bf03 --date=short --no-merges --format='%ad %ae %s'
2018-06-27 tsepez@chromium.org Remove unused m_bGif* fields from CFX_DIBAttribute
2018-06-27 art-snake@yandex-team.ru Rework of loading of CPDF_Document.
2018-06-27 tsepez@chromium.org Use spans and UnownedPtrs in cjpx_decoder.h
2018-06-27 tsepez@chromium.org Remove CXFA_FField::UnloadWidget().
2018-06-27 art-snake@yandex-team.ru Implement CPDF_CrossRefTable


Created with:
  gclient setdep -r src/third_party/pdfium@8444b6a1bf03

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: I03bed8a92e12e5eb934357c167b7df92fb111d62
Reviewed-on: https://chromium-review.googlesource.com/1117143Reviewed-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@{#570889}

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': '2d7cb9267899902ce455165303e2373ac38c867d',
+  'pdfium_revision': '8444b6a1bf03678c195e78612585e93724baacc5',
   # 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.