In RenderLayerRepainter::repaintRectIncludingNonCompositingDescendants, issue
paint invalidations with the previous paint invalidation rect, rather than
computing a new one.

In all of the call sites, the expectation is to issue a special paint invalidation before making
 a destructive update to the render layer/compositing tree.

It also mirrors the logic in RenderLayerRepainter::repaintRectIncludingNonCompositingDescendants.

BUG=391036

Review URL: https://codereview.chromium.org/371913005

git-svn-id: svn://svn.chromium.org/blink/trunk@177608 bbb929c8-8fbe-4397-9dbb-9b2b20218538