SVGFooList shouldn't use bloatedCharacters()

After this CL, there are only a couple of calls to bloatedCharacters in
SVG-land, and none of those are related to parsing strings.

R=pdr@chromium.org
BUG=254708

Review URL: https://codereview.chromium.org/18145007

git-svn-id: svn://svn.chromium.org/blink/trunk@153403 bbb929c8-8fbe-4397-9dbb-9b2b20218538
window.internals shouldn't use bloatedCharacters()

R=eseidel
BUG=254708

Review URL: https://codereview.chromium.org/18446002

git-svn-id: svn://svn.chromium.org/blink/trunk@153404 bbb929c8-8fbe-4397-9dbb-9b2b20218538