Roll src/third_party/pdfium 094f8e6f0c43..daabea6ba6c0 (5 commits)

https://pdfium.googlesource.com/pdfium.git/+log/094f8e6f0c43..daabea6ba6c0

git log 094f8e6f0c43..daabea6ba6c0 --date=short --first-parent --format='%ad %ae %s'
2020-04-02 thestig@chromium.org Use FX_AllocUninit() in FxAllocAllocator.
2020-04-02 thestig@chromium.org Mass rename "nameTree" variables.
2020-04-01 thestig@chromium.org Fix insertions into empty name trees.
2020-04-01 thestig@chromium.org Parse pdfium_tests's feature string in TestRunner.
2020-04-01 asweintraub@google.com Change for loops to use const refs where possible.

Created with:
  gclient setdep -r src/third_party/pdfium@daabea6ba6c0

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/pdfium-autoroll
Please CC pdfium-deps-rolls@chromium.org on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Bug: None
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: Ie789a46175358410baad7265b6f6c48f8af3f2dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2134623Reviewed-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@{#756061}

DEPS

@@ -195,7 +195,7 @@ 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': '094f8e6f0c43b8eda25a5a3dddaa9856da1edc1b',
+  'pdfium_revision': 'daabea6ba6c09f72e956e826b132f1d1b77acb9b',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.