message: Don't enable multisampling
  It never worked in the first place, because we were
  never requesting it in glutin, and it provides no value
  given that textures are already antialiased.
diff: @@ -50,7 +50,6 @@ impl Glsl3Renderer {
  unsafe {
  gl::Enable(gl::BLEND);
  gl::BlendFunc(gl::SRC1_COLOR, gl::ONE_MINUS_SRC1_COLOR);
  - gl::Enable(gl::MULTISAMPLE);
  // Disable depth mask, as the renderer never uses depth tests.
  gl::DepthMask(gl::FALSE);
  