Support type variables as expressions.

tests/language/language_dart2js.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 [ $compiler == dart2js || $compiler == dart2dart ]
 class_literal_test/01: Fail # Class literals are expression now; delete this test.
 class_literal_test/02: Fail # Class literals are expression now; delete this test.
 class_literal_test/05: Fail # Class literals are expression now; delete this test.
 class_literal_test/06: Fail # Class literals are expression now; delete this test.
 class_literal_test/07: Fail # Class literals are expression now; delete this test.
@@ skipping 108 matching lines @@
 final_variable_assignment_test/04: Fail
 bad_override_test/01: Fail
 bad_override_test/02: Fail
 bad_constructor_test/04: Fail # http://dartbug.com/5519
 bad_constructor_test/05: Fail # http://dartbug.com/5519
 bad_constructor_test/06: Fail # http://dartbug.com/5519
 call_nonexistent_constructor_test: Fail
 constructor_named_arguments_test/01: Fail # http://dartbug.com/5519
 getter_no_setter2_test/01: Fail # http://dartbug.com/5519
 getter_no_setter_test/01: Fail # http://dartbug.com/5519
-illegal_invocation_test/03: Fail # http://dartbug.com/5519
 isnot_malformed_type_test/01: Fail # http://dartbug.com/5519
 not_enough_positional_arguments_test/01: Fail # http://dartbug.com/5519
 
 constructor_negative_test: Pass # Wrong reason: the expression 'C()' is valid with class literals.
-illegal_invocation_test/01: Fail, OK # Typedef literals are expressions now.
-illegal_invocation_test/04: Fail, OK # Class literals are expressions now.
 
 throw_expr_test: Fail
 metadata_test: Fail # Metadata on type parameters not supported.
 infinity_test: Fail # Issue 4984
 positive_bit_operations_test: Fail # (floitsch): This will be fixed when dart2js uses unsigned input for >>.
 
 compile_time_constant8_test: Fail # We don't take the generic type into account yet.
 canonical_const_test: Fail # We don't take the generic type into account yet.
-type_parameter_literal_test: Fail # Type parameters aren't supported as literals yet.
 
 # Support for optional parameters not conform to latest spec.
 function_type_alias_test: Fail
 function_type_alias2_test: Fail
 named_parameters_type_test: Fail
 positional_parameters_type_test: Fail
 named_parameters_with_object_property_names_test: Fail
 
 
 # Compilation errors.
@@ skipping 197 matching lines @@
 call_through_null_getter_test: Fail
 closure3_test: Fail
 execute_finally3_test: Fail
 method_invocation_test: Fail
 null_pointer_exception_test: Fail
 stack_overflow_test: Fail
 stack_overflow_stacktrace_test: Fail
 string_interpolate_npe_test: Fail
 closure_call_wrong_argument_count_negative_test: Skip
 label_test: Skip