Remove named function literals from library and tests

Remove named function literals from library and tests

Start eliminating old-style function literals, i.e. remove
return type and function names.

Enforcing new style function literal syntax can be turned
on with the vm flag --strict_function_literals.
Committed: https://code.google.com/p/dart/source/detail?r=14805

[hausner, 2012-11-12 16:55:54]

cc'ing Florian as an FYI due to library changes.

[srdjan, 2012-11-12 19:43:05]

lgtm

[hausner, 2012-11-12 19:51:07]

tyvm