Remove dead RenderView::repaintRectangleInViewAndCompositedLayers

Remove this function since nothing calls it. This also removes a
DisableCompositingQueryAsserts guard that we could never hit since
it was in that dead code.

By removing this function we can also remove the IntRect argument
to repaintCompositedLayers() and simplify that code path.

Review URL: https://codereview.chromium.org/180873013

git-svn-id: svn://svn.chromium.org/blink/trunk@168103 bbb929c8-8fbe-4397-9dbb-9b2b20218538