Roll src/third_party/pdfium/ f6f68c75c..b46ce4172 (1 commit)

https://pdfium.googlesource.com/pdfium.git/+log/f6f68c75ce54..b46ce4172ee8

$ git log f6f68c75c..b46ce4172 --date=short --no-merges --format='%ad %ae %s'
2017-07-07 vmiklos core: fix -Wshadow warnings

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: If7d50f672ece222a1792bc0140a9e9f3e1512caa
Reviewed-on: https://chromium-review.googlesource.com/564063
Reviewed-by: <pdfium-deps-roller@chromium.org>
Commit-Queue: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485116}

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': 'f6f68c75ce54a5865fb19dcb075e7734f1639663',
+  'pdfium_revision': 'b46ce4172ee8282a39997c175dff2bd8f187208f',
   # 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.