SVG isn't imported with proper width/height

[alexjlockwood]

Example SVG:

<svg xmlns:svg="http://www.w3.org/2000/svg"
  xmlns="http://www.w3.org/2000/svg"
  version="1.0"
  width="400"
  height="380">
  <path d="M 151.34904,307.20455 L 264.34904,307.20455 C 264.34904,291.14096 263.2021,287.95455 236.59904,287.95455 C 240.84904,275.20455 258.12424,244.35808 267.72404,244.35808 C 276.21707,244.35808 286.34904,244.82592 286.34904,264.20455 C 286.34904,286.20455 323.37171,321.67547 332.34904,307.20455 C 345.72769,285.63897 309.34904,292.21514 309.34904,240.20455 C 309.34904,169.05135 350.87417,179.18071 350.87417,139.20455 C 350.87417,119.20455 345.34904,116.50374 345.34904,102.20455 C 345.34904,83.30695 361.99717,84.403577 358.75805,68.734879 C 356.52061,57.911656 354.76962,49.23199 353.46516,36.143889 C 352.53959,26.857305 352.24452,16.959398 342.59855,17.357382 C 331.26505,17.824992 326.96549,37.77419 309.34904,39.204549 C 291.76851,40.631991 276.77834,24.238028 269.97404,26.579549 C 263.22709,28.901334 265.34904,47.204549 269.34904,60.204549 C 275.63588,80.636771 289.34904,107.20455 264.34904,111.20455 C 239.34904,115.20455 196.34904,119.20455 165.34904,160.20455 C 134.34904,201.20455 135.49342,249.3212 123.34904,264.20455 C 82.590696,314.15529 40.823919,293.64625 40.823919,335.20455 C 40.823919,353.81019 72.349045,367.20455 77.349045,361.20455 C 82.349045,355.20455 34.863764,337.32587 87.995492,316.20455 C 133.38711,298.16014 137.43914,294.47663 151.34904,307.20455 z"
    fill="black" />
</svg>

The SVG should have a width and height of 400 and 380 respectively. However, the artwork is given a width/height of 100 (which is the default). The user has to manually update the artwork width/height to make the SVG visible as a result.

[alexjlockwood]

Setting a break point on the svg loading code, it seems like it is possible for documentElement.viewBox to be non-null even in cases where the viewBox is not specified, such as in this example. LMK if you see the same behavior (I'm not totally sure how this is meant to be handled... seems like different browsers could handle this differently?).