Roll src/third_party/pdfium/ 96f482c9c..d805eec52 (2 commits).

https://pdfium.googlesource.com/pdfium.git/+log/96f482c9cd3c..d805eec52f6a

$ git log 96f482c9c..d805eec52 --date=short --no-merges --format='%ad %ae %s'
2017-01-11 tsepez Use observed pointers in CPDFSDK_AnnotIterator.
2017-01-11 npm Make tiff_read return actual length read

BUG=679230,670928

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/2625253002
Cr-Commit-Position: refs/heads/master@{#443105}

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': '96f482c9cd3c99425fd3422251903b1218253c66',
+  'pdfium_revision': 'd805eec52f6ac574918748c4270873e7e5cde596',
   # 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.