Follow the method that summing all channels for analysis.
Created attachment 132984 [details] Patch
(In reply to comment #1) > Created an attachment (id=132984) [details] > Patch Uploaded a patch.
Comment on attachment 132984 [details] Patch Clearing flags on attachment: 132984 Committed r111584: <http://trac.webkit.org/changeset/111584>
All reviewed patches have been landed. Closing bug.