Roll src/third_party/pdfium/ dd2a629f9..4e4147ecc (13 commits)

https://pdfium.googlesource.com/pdfium.git/+log/dd2a629f9ede..4e4147eccd25

$ git log dd2a629f9..4e4147ecc --date=short --no-merges --format='%ad %ae %s'
2018-04-23 dsinclair Make CFX_SeekableStreamProxy a subclass of IFX_SeekableReadStream
2018-04-23 dsinclair Change CFX_XML Save to take a write stream
2018-04-23 thestig Validate the Size dictionary entry in CPDF_SampledFunc.
2018-04-23 dsinclair Revert "Change CFX_XML Save to take a write stream"
2018-04-23 dsinclair Revert "Make CFX_SeekableStreamProxy a subclass of IFX_SeekableReadStream"
2018-04-23 dsinclair Make CFX_SeekableStreamProxy a subclass of IFX_SeekableReadStream
2018-04-23 dsinclair Change CFX_XML Save to take a write stream
2018-04-23 hnakashima Create FPDFPageObjMark_GetParamStringValue().
2018-04-23 tsepez Disable JavaScript entirely if no JSPlatform passed by embedder.
2018-04-23 tsepez Provide double-byte terminator in Windows font variant name.
2018-04-23 hnakashima Create API to get PageObject mark parameters.
2018-04-23 thestig Fix some nits in CPDF_SampledFunc().
2018-04-23 thestig Add more image size checks in CJBig2_Context.

Created with:
  roll-dep src/third_party/pdfium
BUG=chromium:835184,chromium:834557


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: Ib1c912e3943955d045f467a5885127d02d6ecac5
Reviewed-on: https://chromium-review.googlesource.com/1024884
Commit-Queue: pdfium-chromium-autoroll <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: pdfium-chromium-autoroll <pdfium-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#552914}

DEPS

@@ -114,7 +114,7 @@ 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': 'dd2a629f9ede484e0e570ce09d1e9d8906aa11be',
+  'pdfium_revision': '4e4147eccd25e66a5c61712121c30c8d5f2ba56c',
   # 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.