Add missing type checks for top level static initializers (issue 1980 and

Add missing type checks for top level static initializers (issue 1980 and
duplicates 1957, 2070, 2224).
Committed: https://code.google.com/p/dart/source/detail?r=6145

[regis, 2012-04-03 17:39:28]

I have updated this cl to rethrow the exception raised by the initializer of a
non-final field. If the field is final, a compiler error is reported, because,
according to the spec "it is a compile-time error if evaluation of a
compile-time constant would raise an exception".

Thanks,
Regis

[hausner, 2012-04-03 19:50:14]

lgtm