code: function getClipRect(clip) {
      var minX = Number.MAX_VALUE;
      var minY = Number.MAX_VALUE;
      var maxX = -Number.MAX_VALUE;
      var maxY = -Number.MAX_VALUE;
      for (var i = 0; i < clip.length; i += 2) {
        var x = clip[i];
        var y = clip[i + 1];
        minX = Math.min(minX, x);
        minY = Math.min(minY, y);
        maxX = Math.max(maxX, x);
        maxY = Math.max(maxY, y);
      }
      if (minX == Number.MAX_VALUE) {
        return null;
      }
      return [minX, minY, maxX - minX, maxY - minY];
    }
docs: The table of available record types can be found here: http://trac.webkit.org/browser/trunk/Source/WebCore/inspector/front-end/TimelinePresentationModel.js#L70 
  Attempts to get the bounding rectangle from clip points.
  @param {!Array.<number>} clip Clip points.
  @return {Array.<number>} The [x,y,w,h] rect or null invalid.