Roll src/third_party/pdfium/ c48089977..a5b37f6b9 (1 commit).

https://pdfium.googlesource.com/pdfium.git/+log/c48089977dc4..a5b37f6b916f

$ git log c48089977..a5b37f6b9 --date=short --no-merges --format='%ad %ae %s'
2016-09-19 kcwu Remove dead code in CCodec_IccModule

TBR=dsinclair@chromium.org

Review-Url: https://codereview.chromium.org/2351783002
Cr-Commit-Position: refs/heads/master@{#419501}

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': 'c48089977dc4d2a63d37e6668382c10b42e22a72',
+  'pdfium_revision': 'a5b37f6b916f1a35d3fbb3f0b41e9e4b4d265370',
   # 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.