Rename argument to avoid bug in Safari 5.1.
Rename argument to avoid bug in Safari 5.1.

Argument 'state' in 'set state' cause Safari 5.1 to throw erroneous error

Fixes #1535

Review URL: https://api.github.com/repos/google/traceur-compiler/issues/1537

Closes #1537, closes #1535.

kittens/traceur-compiler,bazaarvoice/traceur-compiler,bjlxj2008/traceur-compiler,johnjbarton/traceur-compiler,sid0818/traceur-compiler,lintangarief/traceur-compiler,sebgod/traceur-compiler,longze/traceur-compiler,google/traceur-compiler,arv/traceur-compiler,sid0818/traceur-compiler,sebmck/traceur-compiler,arv/traceur-compiler,pandoraui/traceur-compiler,sebgod/traceur-compiler,rossberg-chromium/traceur-soundscript,google/traceur-compiler,johnjbarton/traceur-compiler,vicb/traceur-compiler,lintangarief/traceur-compiler,kittens/traceur-compiler,wilsonokibe/traceur-compiler,sebmck/traceur-compiler,guybedford/traceur-compiler,renie/traceur-compiler,bjlxj2008/traceur-compiler,bazaarvoice/traceur-compiler,rossberg-chromium/traceur-soundscript,wilsonokibe/traceur-compiler,vicb/traceur-compiler,pandoraui/traceur-compiler,longze/traceur-compiler,renie/traceur-compiler