Fix warnings in GrGLInterface mac setup, ignoring proc addr returns. There should be no functional change as these all return NULL on 10.6 and 10.7.
Fix warnings in GrGLInterface mac setup, ignoring proc addr returns. There should be no functional change as these all return NULL on 10.6 and 10.7.


csulmone/skia,csulmone/skia,csulmone/skia,csulmone/skia