GitLab

Bug: 761608
Bug: 771075

Downloaded from http://libpng.download/src/libpng16

https://github.com/glennrp/libpng/commit/edef058e180be435afd8feebb742a22360a7fa3f
(included in this revision) moved the SSE opts directly into the main
libpng source, so contrib/intel/intel_sse.patch is no longer necessary,
as its changes are already included.

Other changes:
- README.chromium:
  - Update version number.
  - Remove references to cherry-picks from upstream, as the fixes are
    now included without cherry-picks.
  - Remove reference to applying intel_sse.patch, which is no longer
    necessary.
- BUILD.gn:
  - Build the intel code from its new location.
- PNGImageDecoderTest.cpp:
  - Remove unnecessary tests. TestFailureDuringDecode attempted to
    modify a valid PNG file to have an error, and then verified that it
    actually had an error, while leaving the FrameCount unchanged. I do
    not see much value to the test, and the apparently more lenient
    newer libpng no longer considers this modified file to be broken.

Change-Id: I2c7e517403609aed2051b91df47dd9f87f62e1ab
Reviewed-on: https://chromium-review.googlesource.com/671029Reviewed-by: Leon Scroggins <scroggo@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Leon Scroggins <scroggo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506749}