Roll src/third_party/pdfium f36a4644b828..6fdfe3876452 (7 commits)

https://pdfium.googlesource.com/pdfium.git/+log/f36a4644b828..6fdfe3876452


git log f36a4644b828..6fdfe3876452 --date=short --no-merges --format='%ad %ae %s'
2018-08-10 tsepez@chromium.org Kill some optional parameters that are always supplied.
2018-08-10 tsepez@chromium.org Remove unused form of PDF_EncodeText().
2018-08-10 thestig@chromium.org Make the 4th parameter in CPDF_Form non-optional.
2018-08-10 thestig@chromium.org Minor cleanup in CPDF_ContentParser.
2018-08-10 thestig@chromium.org Fix sign mismatch in CPDFXFA_DocEnvironment.
2018-08-10 tsepez@chromium.org Make CPDF_PSFunc::m_PS mutable.
2018-08-10 tsepez@chromium.org Remove const args and const_casts where not required.


Created with:
  gclient setdep -r src/third_party/pdfium@6fdfe3876452

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

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=dsinclair@chromium.org

Change-Id: Iab53be69d9f0d924e963168cd83c3c139ebb5d4b
Reviewed-on: https://chromium-review.googlesource.com/1171446Reviewed-by: pdfium-chromium-autoroll <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: pdfium-chromium-autoroll <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#582435}

DEPS

@@ -129,7 +129,7 @@ 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': 'f36a4644b828bd9ad214a42511af91b4a1073eea',
+  'pdfium_revision': '6fdfe387645217cdd77e8e4230a0d8348d831e31',
   # 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.