Roll src/third_party/pdfium/ 3a4ebcc7c..f768baf12 (1 commit)

https://pdfium.googlesource.com/pdfium.git/+log/3a4ebcc7c490..f768baf129fc

$ git log 3a4ebcc7c..f768baf12 --date=short --no-merges --format='%ad %ae %s'
2017-07-14 npm Let CPDF_MeshStream::ReadVertexRow return a vector

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: Ibfec7eb954dbb3874c58fdee951e4dc54432dd65
Reviewed-on: https://chromium-review.googlesource.com/574459
Reviewed-by: <pdfium-deps-roller@chromium.org>
Commit-Queue: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487084}

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': '3a4ebcc7c490eba0c22892ab04d1730c350fd0c0',
+  'pdfium_revision': 'f768baf129fcafc4342193477e0c41c082ef5ca5',
   # 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.