GL_STENCIL_BACK_VALUE_MASK  187 ppapi/lib/gl/include/GLES2/gl2.h #define GL_STENCIL_BACK_VALUE_MASK        0x8CA4
GL_STENCIL_BACK_VALUE_MASK  167 third_party/khronos/GLES2/gl2.h #define GL_STENCIL_BACK_VALUE_MASK        0x8CA4