Remove dead code: getCharactersWithUpconvert
Remove dead code: getCharactersWithUpconvert

There are no callers of this function.

R=adamk

Review URL: https://chromiumcodereview.appspot.com/17963002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@153109 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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