GL_NV_coverage_sample  486 ppapi/lib/gl/include/GLES2/gl2ext.h #ifndef GL_NV_coverage_sample
GL_NV_coverage_sample 1398 ppapi/lib/gl/include/GLES2/gl2ext.h #ifndef GL_NV_coverage_sample
GL_NV_coverage_sample 1215 third_party/khronos/GLES2/gl2ext.h #ifndef GL_NV_coverage_sample