[webkit-reviews] review requested: [Bug 68039] need command line util to print png checksums : [Attachment 107256] revise to shell out to ImageDiff

[bugzilla-daemon at webkit.org]

Dirk Pranke <dpranke at chromium.org> has asked  for review:
Bug 68039: need command line util to print png checksums
https://bugs.webkit.org/show_bug.cgi?id=68039

Attachment 107256: revise to shell out to ImageDiff
https://bugs.webkit.org/attachment.cgi?id=107256&action=review