md-virtual-repeat scroll size not updated

If the number of items shrinks, and scrollOffset > 0, it scrolls to the top, but doesn't update the scroll size. Hence, you're left with a dirty scrollbar.

This is happening here: https://github.com/angular/material/blob/master/src/components/virtualRepeat/virtual-repeater.js#L543

Not familiar with this code, but perhaps it needs to call this.container.setScrollSize(itemsLength * this.itemSize);

In addition to this.container.resetScroll();

Easy fix?

[ngraef]

Possibly related to #4308?

[MCSCC]

Did the auto-complete item window change from "normal" repeat to "virtualRepeat"? from 10.1 to 11? and if so is there a way to force non-virtualRepeat?

Feel free to commit the relevant change in the PR if you can find them easily. Need to learn how to do a PR correctly. :)

I've been using the following fix without problems:
bluebirdtech@0554b1d

I would submit a PR, but I was declined permission.