SVGZoomAndPan shouldn't use bloatedCharacters

This one snuck by earlier because it was operating on an AtomicString.

Also, remove a call to bloatedCharacters in RenderBlockLineLayout.cpp. I meant to upload this in a separate CL, but it ended up in this one.

R=pdr
BUG=254708

Review URL: https://chromiumcodereview.appspot.com/19256005

git-svn-id: svn://svn.chromium.org/blink/trunk@154267 bbb929c8-8fbe-4397-9dbb-9b2b20218538