Rename InvalidationSelfLayout to InvalidationFull

Previously selfNeedsLayout implies full invalidation, but it has been
not true after we separated layout and invalidation requirements.

Review URL: https://codereview.chromium.org/348073002

git-svn-id: svn://svn.chromium.org/blink/trunk@176669 bbb929c8-8fbe-4397-9dbb-9b2b20218538