Roll src/third_party/pdfium/ 605c9f71d..71ba5883d (1 commit).

https://pdfium.googlesource.com/pdfium.git/+log/605c9f71d335..71ba5883dd00

$ git log 605c9f71d..71ba5883d --date=short --no-merges --format='%ad %ae %s'
2016-10-28 tsepez Fix more FX_BOOL / int noise in core/fpdfsdk

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

Review-Url: https://codereview.chromium.org/2459053002
Cr-Commit-Position: refs/heads/master@{#428427}

DEPS

@@ -63,7 +63,7 @@ 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': '605c9f71d33540ba99983d89ac79b2ca250fc730',
+  'pdfium_revision': '71ba5883dd00145b2256935635492cbcc8d94bac',
   # 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.