Roll src/third_party/pdfium/ 2b44441b1..740319850 (1 commit)

https://pdfium.googlesource.com/pdfium.git/+log/2b44441b1b01..740319850255

$ git log 2b44441b1..740319850 --date=short --no-merges --format='%ad %ae %s'
2017-07-06 rharrison Convert c-style casts in fx_memory.h into static_casts

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: I7b5c944644f747ae40b1e3dcb98f95659caa98f6
Reviewed-on: https://chromium-review.googlesource.com/563636
Reviewed-by: <pdfium-deps-roller@chromium.org>
Commit-Queue: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#484951}

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': '2b44441b1b01a809b6f14d44d64db9a52808cba9',
+  'pdfium_revision': '740319850255d4fabf6e3cf4d37ca77857760b8b',
   # 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.