At one point there was an issue with Skia bounds of shadow operations and so the code was sprinkled with calls to draw a transparent rect of the proper bounds to work around the issue.

Now that we are using DisplayList internally instead of SkPictureRecorder, the bounds are correct without the workarounds (also, it is likely that Skia fixed that bug a long time ago and so it was already obsolete even before DisplayList). These code snippets should be removed.

One example: