Roll src/third_party/pdfium/ 98329fe75..69bbfa8fb (3 commits).

https://pdfium.googlesource.com/pdfium.git/+log/98329fe75b9c..69bbfa8fb536

$ git log 98329fe75..69bbfa8fb --date=short --no-merges --format='%ad %ae %s'
2016-11-10 thestig Use more unique_ptrs in CPVT_GenerateAP.
2016-11-10 dsinclair Continue cleaning IFWL classes
2016-11-10 npm Free the FPDF_SYSFONTINFO_DEFAULT instead of delete

BUG=664072

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

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls

TBR=dsinclair@chromium.org

Review-Url: https://codereview.chromium.org/2490703005
Cr-Commit-Position: refs/heads/master@{#431336}

DEPS

@@ -64,7 +64,7 @@ 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': '98329fe75b9c3e5422344a37d787fb22c89c2ca2',
+  'pdfium_revision': '69bbfa8fb536143e045a9dce3006ddd91785adbb',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling openmax_dl
   # and whatever else without interference from each other.