Roll PDFium from 299fe92af960 to e03bf7b4af92 (4 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/299fe92af960..e03bf7b4af92

2020-10-20 thestig@chromium.org Prevent undefined behavior in CFX_DIBBase::GetOverlapRect().
2020-10-20 tsepez@chromium.org Make core/fxge/{fx_dib.h,dib/fx_dib_main.cpp} consistently named.
2020-10-20 tsepez@chromium.org Move some FXDIB_Format functions from .h to .cpp file
2020-10-20 tsepez@chromium.org Make FXDIB_format an enum class.

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:1097499
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: I3388f2c572925d3853eb8b3cf8c6e09c8df3c3b3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2487811Reviewed-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@{#819143}

DEPS

@@ -226,7 +226,7 @@ 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': '299fe92af960a7fd785db410a263a022edc648bd',
+  'pdfium_revision': 'e03bf7b4af92edce27642b529982cd27b680a789',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.