Roll src/third_party/pdfium/ 6058efdbd..d45f99809 (8 commits)

https://pdfium.googlesource.com/pdfium.git/+log/6058efdbdc18..d45f9980995a

$ git log 6058efdbd..d45f99809 --date=short --no-merges --format='%ad %ae %s'
2018-04-09 tsepez Make StringViewTemplate be based on pdfium::span<>.
2018-04-09 dsinclair Revert "Remove CXFA nodes instead of CFX_XML nodes"
2018-04-09 tsepez Make pdfium::span<> be based off of UnownedPtr<>.
2018-04-09 thestig Sort test cases in test_runner.py.
2018-04-09 dsinclair Move the CFX_XMLParser out of CXFA_SimpleParser
2018-04-09 hnakashima Remove m_pOldFocusWidget from CXFA_FFDocView.
2018-04-09 dsinclair Remove CXFA nodes instead of CFX_XML nodes
2018-04-09 dsinclair Move code to set XML value to CXFA_Node

Created with:
  roll-dep src/third_party/pdfium
BUG=chromium:813155,chromium:813155,chromium:813155


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: Iabd3650fc069fbbb35f9b4daa58dd8801abbd3c6
Reviewed-on: https://chromium-review.googlesource.com/1003097Reviewed-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@{#549292}

DEPS

@@ -106,7 +106,7 @@ 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': '6058efdbdc186e120e7e2121c290ac4d820ffbf8',
+  'pdfium_revision': 'd45f9980995af5c6e4c68e32df89d3cccb0231ef',
   # 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.