bug 904330 - step 01 - Add mozilla::GLFeature - r=jgilbert
bug 904330 - step 02 - Changes GLContext's extension group query names - r=jgilbert
bug 904330 - step 03 - Uses mozilla::GLFeature instead of old extension group queries - r=jgilbert
bug 904330 - step 04 - Remove old extension group queries - r=jgilbert
bug 904330 - step 05 - Rename GLContextExtensionGroupQueries.cpp to GLContextFeatures.cpp - r=jgilbert

--HG--
rename : gfx/gl/GLContextExtensionGroupQueries.cpp => gfx/gl/GLContextFeatures.cpp