Roll PDFium from e03bf7b4af92 to d86ca92685bb (6 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/e03bf7b4af92..d86ca92685bb

2020-10-21 thestig@chromium.org Disallow more CFX_ScanlineCompositor conversions.
2020-10-21 thestig@chromium.org Move MakeMaybeAlphaRGBFormat() to the only file where it is used.
2020-10-21 tsepez@chromium.org Rename CFX_DIBBase::IsAlphaMask() to IsMask().
2020-10-21 thestig@chromium.org Add some unit tests for CFX_DIBBase::GetOverlapRect().
2020-10-21 thestig@chromium.org Remove 2 CPDF_ImageRenderer::Start() parameters.
2020-10-20 tsepez@chromium.org Pass CFX_BitmapCompositor::m_BlendType to compositor.

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:11398257
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: Ifa28ba749cf45f20af4d4227d6b0692ebb0680b6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2489674Reviewed-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@{#819476}

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': 'e03bf7b4af92edce27642b529982cd27b680a789',
+  'pdfium_revision': 'd86ca92685bbb41ee752bc2fa29365b4bd2aa631',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.