Roll src/third_party/pdfium/ 4d9df422c..fc9b11358 (2 commits).

https://pdfium.googlesource.com/pdfium.git/+log/4d9df422c340..fc9b11358a47

$ git log 4d9df422c..fc9b11358 --date=short --no-merges --format='%ad %ae %s'
2016-08-31 npm Move maxNumDataBytes and maxNumEcBytes calculation to fix crash
2016-08-31 tsepez Make CPDF_ColorState have a CFX_ColorStateData rather than inheriting

TBR=dsinclair@chromium.org

Review-Url: https://codereview.chromium.org/2298603005
Cr-Commit-Position: refs/heads/master@{#415732}

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': '4d9df422c340b3bc33e044d3d94e1ff9582e1260',
+  'pdfium_revision': 'fc9b11358a47e1dd9b257263c9457d7e53b9dd10',
   # 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.