Don't force incremental invalidation on mayNeedPaintInvalidation

Avoid incremental invalidations of objects which change size but there is no content.

BUG=415719

Review URL: https://codereview.chromium.org/582903002

git-svn-id: svn://svn.chromium.org/blink/trunk@182359 bbb929c8-8fbe-4397-9dbb-9b2b20218538