GL_COVERAGE_EDGE_FRAGMENTS_NV  493 ppapi/lib/gl/include/GLES2/gl2ext.h #define GL_COVERAGE_EDGE_FRAGMENTS_NV                           0x8ED6
GL_COVERAGE_EDGE_FRAGMENTS_NV 1223 third_party/khronos/GLES2/gl2ext.h #define GL_COVERAGE_EDGE_FRAGMENTS_NV     0x8ED6