Roll src/third_party/pdfium b6e7d49ad5f3..d4e7ca034cbb (3 commits)

https://pdfium.googlesource.com/pdfium.git/+log/b6e7d49ad5f3..d4e7ca034cbb


git log b6e7d49ad5f3..d4e7ca034cbb --date=short --no-merges --format='%ad %ae %s'
2018-08-30 tsepez@chromium.org Add unit test for AutoRestorer<> on smart pointer types.
2018-08-30 tsepez@chromium.org Use pdfium::span<> arg in A85 and RLE encoder methods
2018-08-30 tsepez@chromium.org Use span<> in CFX_FontMgr


Created with:
  gclient setdep -r src/third_party/pdfium@d4e7ca034cbb

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

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: Ib094f35ed0b7da0c0dceaf8561451afc760cb663
Reviewed-on: https://chromium-review.googlesource.com/1198205Reviewed-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@{#587897}

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': 'b6e7d49ad5f3a54b69f70b347bd41108493918b7',
+  'pdfium_revision': 'd4e7ca034cbbe29911b08eb5c252aa0d05b6a429',
   # 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.