Roll src/third_party/pdfium 60627d6eafd0..4174b5ab6ac9 (2 commits)

https://pdfium.googlesource.com/pdfium.git/+log/60627d6eafd0..4174b5ab6ac9


git log 60627d6eafd0..4174b5ab6ac9 --date=short --no-merges --format='%ad %ae %s'
2018-08-10 tsepez@chromium.org Add CFX_DIBSource::GetWritableScanline().
2018-08-09 tsepez@chromium.org Move all utf8 decoding under fx_string.h


Created with:
  gclient setdep -r src/third_party/pdfium@4174b5ab6ac9

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: Id740ab3447b12f44c2d3d1ecbab50da62dd3e9b2
Reviewed-on: https://chromium-review.googlesource.com/1170283Reviewed-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@{#582040}

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': '60627d6eafd025dde711e532eee6866840c04bef',
+  'pdfium_revision': '4174b5ab6ac9024acb9b42acbb61d628a2a679e3',
   # 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.