GL_STENCIL_VALUE_MASK  180 ppapi/lib/gl/include/GLES2/gl2.h #define GL_STENCIL_VALUE_MASK             0x0B93
GL_STENCIL_VALUE_MASK  160 third_party/khronos/GLES2/gl2.h #define GL_STENCIL_VALUE_MASK             0x0B93