Roll PDFium from d452e06b175c to 8ee14407329b (8 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/d452e06b175c..8ee14407329b

2020-06-18 thestig@chromium.org Fix some typos.
2020-06-18 tsepez@chromium.org Introduce GCedTreeNode class template.
2020-06-17 nigi@chromium.org Create struct CFX_TextRenderOptions to represent text rendering options.
2020-06-17 tsepez@chromium.org Introduce CONSTRUCT_VIA_MAKE_RETAIN macro.
2020-06-17 thestig@chromium.org Add a test case for another FPDFAttachment_GetFile() failure mode.
2020-06-17 nigi@chromium.org Fix two embeddertests for Skia/SkiaPaths.
2020-06-16 tsepez@chromium.org Split off HeapEmbedderTest into GCedEmbedderTest.
2020-06-16 nigi@chromium.org Enable FPDFAnnotEmbedderTest.AddAndModifyImage for SkiaPaths.

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:177188
Tbr: pdfium-deps-rolls@chromium.org
Change-Id: I2b1f4f6eda41af5aa2615fffdf62c95d82902e37
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2251357Reviewed-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@{#779703}

DEPS

@@ -202,7 +202,7 @@ 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': 'd452e06b175cea3e82bc62280d349e28295f603c',
+  'pdfium_revision': '8ee14407329b8ed5661c53ad33a2385bc3c491cf',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.