The "f()" call in the export is the solid color fill. Just replace this with your bitmap fill:
this.shape.graphics.beginBitmapFill( image ).s().p("AifCgIAAk/IE/AAIAAE/g");
Note that the fill will not show up unless your stage is updated (ie. redrawn) after the image has loaded. As such, you'll probably either want to preload that image before running this drawing code, or make sure that stage.update() is called after "image" loads. The latter will happen automatically if you have an active Ticker updating the stage (which Flash sets up on export if you have any animation in your FLA).