dart2js CPS: implement special handling of the Symbol constructor.

tests/corelib/corelib.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 == none || $compiler == precompiler) && ($runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid) ]
 bool_from_environment2_test: Skip
 bool_from_environment_test: Skip
 from_environment_const_type_test: Skip
 from_environment_const_type_undefined_test: Skip
 int_from_environment2_test: Skip
@@ skipping 11 matching lines @@
 
 # #void should be a valid symbol.
 [ ($compiler == none || $compiler == precompiler) || $compiler == dart2js ]
 symbol_reserved_word_test/02: CompileTimeError # bug 20191
 symbol_reserved_word_test/05: CompileTimeError # bug 20191
 
 [ ($compiler == none || $compiler == precompiler) && ($runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid) ]
 symbol_reserved_word_test/02: RuntimeError # bug 20191 / dartium/drt cannot detect CompileTimeErrors
 symbol_reserved_word_test/05: RuntimeError # bug 20191 / dartium/drt cannot detect CompileTimeErrors
 
-# new Symbol('void') should be allowed.
 [ $compiler == dart2js ]
-symbol_reserved_word_test/03: RuntimeError # bug 19972
+symbol_reserved_word_test/03: RuntimeError # bug 19972, new Symbol('void') should be allowed.
 int_parse_radix_test/01: Pass, Fail # JS implementations disagree on U+0085 being whitespace.
 int_parse_radix_test/02: Fail # No bigints.
 double_parse_test/01: Pass, Fail # JS implementations disagree on U+0085 being whitespace.
 integer_to_radix_string_test: RuntimeError # issue 22045
 int_modulo_arith_test/bignum: RuntimeError # No bigints.
 int_modulo_arith_test/modPow: RuntimeError # No bigints.
 
 
 # With the exception of 'void', const Symbol() should not accept reserved
 # words.
@@ skipping 136 matching lines @@
 
 [ $mode == debug ]
 regexp/pcre_test: Pass, Slow # Timeout. Issue 22008
 
 [ ($runtime == vm || $runtime == dart_precompiled) && $arch == simarmv5te ]
 int_parse_radix_test/*: Pass, Slow
 big_integer_parsed_mul_div_vm_test: Pass, Slow
 
 [ $compiler == dart2js && $cps_ir ]
 data_resource_test: Crash # (await for(var byteSlice in resource.openRead()){streamBytes.addAll(byteSlice);}): await for
-error_stack_trace1_test: Pass # H.unwrapException(...).get$stackTrace is not a function
 growable_list_test: RuntimeError # Typed lists
 iterable_empty_test: RuntimeError # Please triage this failure.
 iterable_return_type_test/none: RuntimeError # Please triage this failure.
 iterable_to_list_test: RuntimeError # Please triage this failure.
 iterable_to_set_test: RuntimeError # Please triage this failure.
 list_filled_type_argument_test: RuntimeError # Please triage this failure.
 list_unmodifiable_test: RuntimeError # Please triage this failure.
 package_resource_test: Crash # (await for(var byteSlice in resource.openRead()){streamBytes.addAll(byteSlice);}): await for
 regexp/pcre_test: Crash # Stack Overflow in LoopHierarchy.
-symbol_operator_test/03: RuntimeError # Issue 24878
-symbol_reserved_word_test/03: Pass # Please triage this failure.
-symbol_reserved_word_test/06: RuntimeError # Please triage this failure.
-symbol_reserved_word_test/09: RuntimeError # Please triage this failure.
-symbol_reserved_word_test/12: RuntimeError # Please triage this failure.
-symbol_test/none: RuntimeError # Please triage this failure.
 
 [ $compiler == dart2js && $cps_ir && $host_checked ]
 regexp/pcre_test: Crash # Stack Overflow
 
 [ ($noopt || $compiler == precompiler) ]
 apply3_test: CompileTimeError # Imports dart:mirrors
 regexp/stack-overflow_test: RuntimeError, OK # Smaller limit with irregex interpreter
 big_integer_huge_mul_vm_test: Pass, Timeout # --no_intrinsify
 big_integer_parsed_mul_div_vm_test: Pass, Timeout # --no_intrinsify
 int_parse_radix_test: Pass, Timeout # --no_intrinsify