Roll src/third_party/pdfium/ 1f2489023..41d6bbe3d (1 commit).

https://pdfium.googlesource.com/pdfium.git/+log/1f2489023f2b..41d6bbe3d413

$ git log 1f2489023..41d6bbe3d --date=short --no-merges --format='%ad %ae %s'
2016-09-14 npm Delete unused parameter nWordStyle from GetCharWidth()

TBR=dsinclair@chromium.org

Review-Url: https://codereview.chromium.org/2340103002
Cr-Commit-Position: refs/heads/master@{#418652}

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': '1f2489023f2b808c41071d992abceb646ade8e1b',
+  'pdfium_revision': '41d6bbe3d413e7854be89142b70c42a89e315cba',
   # 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.