third_party/WebKit/LayoutTests/fast/canvas/canvas-filter-svg-bbox.html

<svg style="display: block; width: 0; height: 0">
  <defs>
    <filter id="color-matrix">
      <fecolormatrix type="matrix" in="SourceGraphic" values="0 0 0 0 0 
                0 0 0 0 1 
                0 0 0 0 0 
                0 0 0 0 1"></fecolormatrix>
    </filter>
  </defs>
</svg>
<canvas id="canvas" width="100" height="100"></canvas>
<script>
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
ctx.filter = 'url(#color-matrix)';
ctx.fillStyle = '#fff';
ctx.fillRect(25, 25, 50, 50);
</script>