Roll PDFium from df34e3c37407 to c6c2cc49fa95 (19 revisions)

https://pdfium.googlesource.com/pdfium.git/+log/df34e3c37407..c6c2cc49fa95

2020-07-28 thestig@chromium.org Remove some OS_ comments on #else lines.
2020-07-28 thestig@chromium.org Use int16_t with CPDF_CIDFont::GetVertOrigin().
2020-07-28 thestig@chromium.org Make OutputFormat in pdfium_test.cc an enum class.
2020-07-28 vmiklos@collabora.co.uk Add FPDFSignatureObj_GetSubFilter() API
2020-07-28 thestig@chromium.org Rename "render" to "process" in some places in pdfium_test.
2020-07-28 thestig@chromium.org Improve object type checking for /CIDToGIDMap.
2020-07-28 thestig@chromium.org Fix some nits in CPDF_CIDFont.
2020-07-28 thestig@chromium.org Clean up CPDF_TextObject::GetCharInfo().
2020-07-27 nigi@chromium.org Enable embedder tests RenderWithPause and RenderWithoutPause for Skia/SkiaPaths.
2020-07-27 nigi@chromium.org Consolidate repetitive checksum values for embedder tests.
2020-07-27 nigi@chromium.org Enable FPDFEditEmbedderTest.AddMarkCompressedStream for Skia/SkiaPaths.
2020-07-27 tsepez@chromium.org Remove friendship between CPDFXFA_Context and CPDFXFA_DocEnvironment.
2020-07-27 tsepez@chromium.org Remove CXFA_RenderContext
2020-07-27 tsepez@chromium.org Use uniform snake_case_ member names in CXFA_DocumentBuilder
2020-07-27 tsepez@chromium.org Move ownership of XML document up to CPDFXFA_Context.
2020-07-27 nigi@chromium.org In test suite FPDFAnnotEmbedderTest, enable ExtractInkMultiple and GetSetStringValue for Skia/SkiaPaths.
2020-07-27 nigi@chromium.org Enable FPDFAnnotEmbedderTest.ModifyRectQuadpointsWithAP for SkiaPaths.
2020-07-27 pdfium-autoroll@skia-public.iam.gserviceaccount.com Roll Catapult from a2a7e05eb765 to 0606ae6f9a56 (61 revisions)
2020-07-27 pdfium-autoroll@skia-public.iam.gserviceaccount.com Roll Code Coverage from a70177d4a2e5 to af90718d311e (1 revision)

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: I6505b1bb2f88329f0c0f26fd946279e80f882c83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2322207Reviewed-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@{#792222}

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': 'df34e3c37407321369e09837155862c0068c3cd7',
+  'pdfium_revision': 'c6c2cc49fa957709e2ac1569041d4799feda9941',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.