Roll src/third_party/pdfium/ 9294ffdf3..c9cd28742 (5 commits)

https://pdfium.googlesource.com/pdfium.git/+log/9294ffdf371f..c9cd2874278e

$ git log 9294ffdf3..c9cd28742 --date=short --no-merges --format='%ad %ae %s'
2018-05-01 hnakashima Transform float out params from reference to pointer in CXFA_Node.
2018-05-01 tsepez Add CPDF_Document::Extension::DeletePage()
2018-05-01 tsepez Avoid perpetual spins for parserless CPDF_Pages
2018-05-01 hnakashima Transform size out param from reference to pointer in CXFA_Node.
2018-05-01 hnakashima Transform rect out param from reference to pointer in XFA code.

Created with:
  roll-dep src/third_party/pdfium


The AutoRoll server is located here: https://pdfium-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=dsinclair@chromium.org

Change-Id: Ia3177603cfe492a853b4aa4903c52473995b84ef
Reviewed-on: https://chromium-review.googlesource.com/1038686Reviewed-by: pdfium-chromium-autoroll <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: pdfium-chromium-autoroll <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#555289}

DEPS

@@ -120,7 +120,7 @@ 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': '9294ffdf371fbae8c166dd5e3c63955f1d3ab18e',
+  'pdfium_revision': 'c9cd2874278e5395a150d8ad08f44bc738bce6be',
   # 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.