exp/html: add parseImpliedToken method to parser
exp/html: add parseImpliedToken method to parser

This method will allow us to be explicit about what we're doing when
we insert an implied token, and avoid repeating the logic involved in
multiple places.

R=nigeltao
CC=golang-dev
http://codereview.appspot.com/6060048

Committer: Nigel Tao <58ae08b3356928ff9c67562b4719487d54fe8348@golang.org>

gnanderson/go,tv42/old-go,pombredanne/go-deleteme,tv42/old-go,apparentlymart/golang,apparentlymart/golang,dsriram/golang,dsriram/golang,apparentlymart/golang,gnanderson/go,tv42/old-go,gnanderson/go,apparentlymart/golang,pombredanne/go-deleteme,gnanderson/go,tv42/old-go,dsriram/golang,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,dsriram/golang,pombredanne/go-deleteme,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,dsriram/golang,tv42/old-go,dsriram/golang,apparentlymart/golang,gnanderson/go,gnanderson/go,apparentlymart/golang