GL_SAMPLE_ALPHA_TO_COVERAGE  149 ppapi/lib/gl/include/GLES2/gl2.h #define GL_SAMPLE_ALPHA_TO_COVERAGE       0x809E
GL_SAMPLE_ALPHA_TO_COVERAGE  136 third_party/khronos/GLES2/gl2.h #define GL_SAMPLE_ALPHA_TO_COVERAGE       0x809E