Roll src/third_party/pdfium/ a64cd6c86..f6ca07b3f (1 commit)

https://pdfium.googlesource.com/pdfium.git/+log/a64cd6c86438..f6ca07b3fda4

$ git log a64cd6c86..f6ca07b3f --date=short --no-merges --format='%ad %ae %s'
2017-06-01 tsepez Replace some repeated code with existing CFXJS_Engine::NewString() helper.

Created with:
  roll-dep src/third_party/pdfium


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

Change-Id: I39203fdc81880f9440fbbbb80f3d3320cdaa0b6a
Reviewed-on: https://chromium-review.googlesource.com/521722
Reviewed-by: <pdfium-deps-roller@chromium.org>
Commit-Queue: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476388}

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': 'a64cd6c86438636b031e1204057b27a8b9673296',
+  'pdfium_revision': 'f6ca07b3fda40f0c5d5690caad8ac931cb46ccf6',
   # 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.