'Skip' argument to Sema::GetTypeForDeclarator

Hi Sebastian,

I see you added the Skip argument to Sema::GetTypeForDeclarator, and that it is only used when processing new expressions. Can you please eliminate this by making ActOnCXXNew remove the DeclaratorChunk from the Declarator if appropriate? I'd prefer to keep GetTypeForDeclarator as simple as possible, and this approach would isolate the complexity in the one place that needs it.