Roll src/third_party/pdfium/ 6c740e296..f24fc1e69 (6 commits)

https://pdfium.googlesource.com/pdfium.git/+log/6c740e29640c..f24fc1e69d77

$ git log 6c740e296..f24fc1e69 --date=short --no-merges --format='%ad %ae %s'
2017-08-03 hnakashima Add script to compare performance of two versions of pdfium.
2017-08-03 janeliulwq Added testing flag --save-images that saves embedded images
2017-08-03 janeliulwq APIs and tests for retrieving raw/decoded data from image objects
2017-08-03 npm LibTIFF: fix defines in tiffconf
2017-08-02 janeliulwq APIs and tests for extracting bitmaps from image objects
2017-08-03 tsepez kill some stray __native_client__ defines

Created with:
  roll-dep src/third_party/pdfium


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

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


TBR=dsinclair@chromium.org

Change-Id: Ic5a7ceded4cffa44d2a74c157da048d4cfebc575
Reviewed-on: https://chromium-review.googlesource.com/601446
Reviewed-by: <pdfium-deps-roller@chromium.org>
Commit-Queue: <pdfium-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491931}

DEPS

@@ -64,7 +64,7 @@ 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': '6c740e29640ceb392c1845e120eaab6f981b6551',
+  'pdfium_revision': 'f24fc1e69d77db16527de99bff192693878f4080',
   # 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.