tree bffdff45795562484fb71631a35ed3101e4f6ed8
parent 424cc26add7ed491c6941d0c0c3a0e6d83190307
author jcgregorio <jcgregorio@google.com> 1432316533 -0700
committer Commit bot <commit-bot@chromium.org> 1432316533 -0700

Add more detail on how DM checksums are done.

This will be linked to from Gold for image diffs that have
different digests but no pixel differences.

BUG=skia:
NOTRY=true
DOCS_PREVIEW= https://skia.org/?cl=1151153005

Review URL: https://codereview.chromium.org/1151153005