Currently, the GTest-based pixel test is showing the repositioning border when it shouldn't https://chrome-vr-gold.skia.org/img/images/2e6f2b6ea9c1ce020b42a3d5376778c5.png.

This appears to be due to the border being initialized to the wrong opacity, but getting hidden quickly enough during normal usage that it hasn't been noticed.

https://chromium-review.googlesource.com/c/chromium/src/+/1000517 fixes the issue, but causes a unittest to fail.