First pass at ripping out non-deferred SVG filter path.

There will be more to come, especially once the CSS deferred
path has proven itself and stuck and we can remove big
chunks of FilterEffect.

BUG=

Review URL: https://codereview.chromium.org/500233002

git-svn-id: svn://svn.chromium.org/blink/trunk@182529 bbb929c8-8fbe-4397-9dbb-9b2b20218538