After compiling the GL programs, the implementation query the info log of the driver with glGetProgramInfoLog(). The result is not used, I think this part is remaining from debug informations used in development.
Created attachment 71758 [details]
Comment on attachment 71758 [details]
Clearing flags on attachment: 71758
Committed r70933: <http://trac.webkit.org/changeset/70933>
All reviewed patches have been landed. Closing bug.