Intent to remove:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/GzMh_HfjUVc

This method is removed is from SVG2, uses the deprecated CSSValue and use counter data indicates it is little or not used.

Review URL: https://codereview.chromium.org/196173020

git-svn-id: svn://svn.chromium.org/blink/trunk@170077 bbb929c8-8fbe-4397-9dbb-9b2b20218538