Roll src/third_party/pdfium/ 50034a679..fbda17d61 (2 commits).

https://pdfium.googlesource.com/pdfium.git/+log/50034a679249..fbda17d61de1

$ git log 50034a679..fbda17d61 --date=short --no-merges --format='%ad %ae %s'
2016-08-30 tsepez Make CPDF_TextState have a CPDF_TextStateData rather than inheriting one.
2016-08-30 dsinclair Guard against overflow when calculating font weight.

BUG=641418

TBR=dsinclair@chromium.org

Review-Url: https://codereview.chromium.org/2292243002
Cr-Commit-Position: refs/heads/master@{#415408}

DEPS

@@ -60,7 +60,7 @@ 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': '50034a679249390852ac26a4119d35fbe124300e',
+  'pdfium_revision': 'fbda17d61de1e02799f5d77dceb23df3688b764e',
   # 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.