Represent declared type parameters of a class as an array of TypeParameter

Represent declared type parameters of a class as an array of TypeParameter
rather than an array of String and simplify code accordingly.
Rename the field holding type parameter bounds of a class.

Note: I retract my earlier suggestion to Srdjan to represent interfaces of a
class (as well as its canonical types) as a TypeArguments. This would require
more code to check for an empty array and for growing the array. Besides, these
are really arrays and have nothing to do with type arguments. I removed the
corresponding TODO(srdjan).
Committed: https://code.google.com/p/dart/source/detail?r=4096

[regis, 2012-02-09 17:23:44]

Hi Matthias :-)

I'm back (kind of).

Thanks,
Regis

[hausner, 2012-02-09 21:24:47]

Welcome back. LGTM.

[regis, 2012-02-09 21:29:24]

Thanks!