GL_STENCIL_CLEAR_VALUE  174 ppapi/lib/gl/include/GLES2/gl2.h #define GL_STENCIL_CLEAR_VALUE            0x0B91
GL_STENCIL_CLEAR_VALUE  154 third_party/khronos/GLES2/gl2.h #define GL_STENCIL_CLEAR_VALUE            0x0B91