Roll PDFium from 7acbae90a490 to 561f5af9ef1e (15 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/7acbae90a490..561f5af9ef1e

2021-01-21 tsepez@chromium.org Enable incremental sweeping for XFA
2021-01-21 tsepez@chromium.org Remove includes of windows tchar.h.
2021-01-21 awscreen@chromium.org Roll third_party/skia/ ae95077db..81bfabeb1 (783 commits)
2021-01-21 awscreen@chromium.org Roll third_party/zlib/ c29ee8c9c..2c183c9f9 (1 commit)
2021-01-21 awscreen@chromium.org Roll third_party/libjpeg_turbo/ d5148db38..518d81558 (4 commits)
2021-01-21 awscreen@chromium.org Roll v8/ c52956d09..1d681a1a9 (483 commits)
2021-01-21 awscreen@chromium.org Roll base/trace_event/common/ eb94f1c7a..9b2775773 (1 commit)
2021-01-20 awscreen@chromium.org Roll third_party/instrumented_libraries/ 6ba978ccb..4d3867052 (1 commit)
2021-01-20 awscreen@chromium.org Roll third_party/icu/ 6a33b647c..899e18383 (4 commits)
2021-01-20 awscreen@chromium.org Roll third_party/googletest/src/ 4fe018038..d128fc825 (156 commits)
2021-01-20 awscreen@chromium.org Roll third_party/freetype/src/ 8cc4d0dc3..03ceda970 (87 commits)
2021-01-20 awscreen@chromium.org Roll third_party/depot_tools/ 18f45d287..3253a1dec (83 commits; 22 trivial rolls)
2021-01-20 awscreen@chromium.org Roll tools/clang/ 9ec0bb322..683dad603 (18 commits)
2021-01-20 awscreen@chromium.org Roll buildtools/ 6302c1175..c38b5ab1c (5 commits)
2021-01-20 awscreen@chromium.org Roll build/ 33d5eb773..781f0025b (185 commits)

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/+doc/master/autoroll/README.md

Bug: chromium:1156170
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: If5588051d04a818c95631e7bad57a3670f0e5fb5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2641647Reviewed-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@{#845534}

DEPS

@@ -219,7 +219,7 @@ 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': '7acbae90a490507ec9b9d966cf58de45b7ec3298',
+  'pdfium_revision': '561f5af9ef1e208c3c6170f8ec1907856593dc3a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.