Reverted on the way to reverting 154271. Reverted because of a new
failure on fast/text-autosizing/cluster-inline-grid-flex-box.html.

Revert "SVGTextMetrics shouldn't use bloatedCharacters"

This reverts commit bfb8f971d2ecd69acb080b5e1d7873800ec3a6e4.

git-svn-id: svn://svn.chromium.org/blink/trunk@154290 bbb929c8-8fbe-4397-9dbb-9b2b20218538