GL_COVERAGE_COMPONENT_NV  487 ppapi/lib/gl/include/GLES2/gl2ext.h #define GL_COVERAGE_COMPONENT_NV                                0x8ED0
GL_COVERAGE_COMPONENT_NV 1217 third_party/khronos/GLES2/gl2ext.h #define GL_COVERAGE_COMPONENT_NV          0x8ED0