Revert "Roll PDFium from fca083c57b5f to 3a384ed186dd (15 revisions)"

This reverts commit d44a76f0.

Reason for revert: Bot failure linux-trusty-rel
https://ci.chromium.org/p/chromium/builders/ci/linux-trusty-rel

Original change's description:
> Roll PDFium from fca083c57b5f to 3a384ed186dd (15 revisions)
>
> https://pdfium.googlesource.com/pdfium.git/+log/fca083c57b5f..3a384ed186dd
>
> 2020-10-06 thestig@chromium.org Use DCHECK_IS_ON() in cfx_char.cpp.
> 2020-10-06 nigi@chromium.org Roll v8/ c577d027e..88d84cce1 (632 commits)
> 2020-10-05 nigi@chromium.org Roll buildtools/ ff93f3ea1..4be464e05 (3 commits)
> 2020-10-05 nigi@chromium.org Roll third_party/instrumented_libraries/ 3c52ccdd3..6ba978ccb (1 commit)
> 2020-10-05 nigi@chromium.org Roll third_party/skia/ d20e8e933..4c3486e6f (572 commits; 1 trivial rolls)
> 2020-10-05 nigi@chromium.org Disable embedder tests which fail with Skia/SkiaPaths enabled.
> 2020-10-05 nigi@chromium.org Roll third_party/libjpeg_turbo/ 9d4f8005b..d5148db38 (12 commits)
> 2020-10-05 nigi@chromium.org Roll third_party/zlib/ d53accfbd..26211a5a8 (6 commits)
> 2020-10-05 tsepez@chromium.org Pass spans of floats to CPDF_ColorSpace::GetRGB().
> 2020-10-05 thestig@chromium.org Make variable naming consistent in CPDF_TextPage::GetRectArray().
> 2020-10-05 thestig@chromium.org Replace ASSERT() with DCHECK() in various xfa dirs.
> 2020-10-05 nigi@chromium.org Roll third_party/icu/ 79326efe2..aba3f0dfe (8 commits)
> 2020-10-05 thestig@chromium.org Move FPDFText_GetLooseCharBox() logic into cpdf_textpage.cpp.
> 2020-10-05 nigi@chromium.org Roll third_party/depot_tools/ ed15af5c4..422c039e8 (82 commits; 44 trivial rolls)
> 2020-10-05 thestig@chromium.org Move CAgg_PathData out of fx_agg_driver.h.
>
> 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: None
> Tbr: pdfium-deps-rolls@chromium.org
> Change-Id: I032363e1edfff4cdb5378ca692070f30fef64097
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2451889
> Reviewed-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@{#814108}

TBR=chromium-autoroll@skia-public.iam.gserviceaccount.com,pdfium-deps-rolls@chromium.org

Change-Id: Ic57232e976e9e85929c115492ea5edf4e11b3755
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1135509
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2452532
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Reviewed-by: Nohemi Fernandez <fernandex@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814178}

DEPS

@@ -215,7 +215,7 @@ 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': '3a384ed186dd92a2250da859659dbeb22321e630',
+  'pdfium_revision': 'fca083c57b5f095e62bf2fc3121a429227a8487f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.