Roll PDFium from 2e1b4f26b4e0 to f28c13ed2325 (11 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/2e1b4f26b4e0..f28c13ed2325

2020-07-10 tsepez@chromium.org Add CXFA_Document::GetHeap().
2020-07-10 thestig@chromium.org Remove _FX_PLATFORM_LINUX_.
2020-07-10 thestig@chromium.org Remove _FX_PLATFORM_LINUX_ in tests.
2020-07-10 nigi@chromium.org Avoid using integer as fill options in CFX_AggDeviceDriver.
2020-07-10 tsepez@chromium.org Move CJX_Node::GetXFANode() to CJX_Object.
2020-07-10 tsepez@chromium.org Make GCedEmbedderTest share resources with JSEmbedderTest.
2020-07-10 tsepez@chromium.org Rename CFXA_FFNotify::GetHDOC() to GetFFDoc()
2020-07-10 nigi@chromium.org Change parameter types for CGdiplusExt::DrawPath() and GdiFillType2Gdip().
2020-07-10 tsepez@chromium.org Add |final| keyword to CXFA_{Content,View}LayoutItem.
2020-07-10 tsepez@chromium.org Include cppgc/allocation.h in fxjs/gc/heap.h.
2020-07-10 tsepez@chromium.org Add const to CJX_Object::object_

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: I51ac80ffe8cf727cfd653492a0355deade8b6e76
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2293540Reviewed-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@{#787479}

DEPS

@@ -214,7 +214,7 @@ 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': '2e1b4f26b4e0c6f150d4933190ed749ff30ae1ad',
+  'pdfium_revision': 'f28c13ed2325d349db632e9a8f19c4e9696f63ae',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.