Roll src/third_party/pdfium 514727027113..6caa1897fd2c (3 commits)

https://pdfium.googlesource.com/pdfium.git/+log/514727027113..6caa1897fd2c


git log 514727027113..6caa1897fd2c --date=short --no-merges --format='%ad %ae %s'
2019-06-21 thestig@chromium.org Fix lots of nits in xfa/fwl code.
2019-06-21 thestig@chromium.org Remove some unneeded cfx_renderdevice.h #includes from headers.
2019-06-21 thestig@chromium.org Move class TextCharPos into its own file.


Created with:
  gclient setdep -r src/third_party/pdfium@6caa1897fd2c

The AutoRoll server is located here: https://autoroll.skia.org/r/pdfium-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=pdfium-deps-rolls@chromium.org

Change-Id: I5123f45e7d69347ea9ebde64c490e2f3b014fe42
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1670697Reviewed-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@{#671390}

DEPS

@@ -158,7 +158,7 @@ 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': '51472702711387a2ab6b9b5b23f1790d446a56a0',
+  'pdfium_revision': '6caa1897fd2c681fdc720dfa92c2b93f8e2645aa',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling BoringSSL
   # and whatever else without interference from each other.