Add apply method signature to Function class.

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 ]
 unicode_test: Fail        # Bug 5163868
 *dartc_test: Skip
 compare_to2_test: Fail    # Bug 4018
 null_test: Fail           # Bug 5511
-null_nosuchmethod_test: Fail # BUg 5518
+null_nosuchmethod_test: Fail # Bug 5518
+apply_test: Fail # Bug 5670
 
 [ $compiler == dartc ]
 *vm_test: Skip
 
 [ $runtime == ff || $runtime == ie ]
 unicode_test: Fail
 
 # TODO(jmesserly): now that we have a bot, we need to set up Opera testing.
 [ $runtime == opera ]
 *: Skip
 
 [ $runtime == ie && ($system == linux || $system == macos) ]
 *: Skip
 
 [ $runtime == safari && ($system == linux || $system == windows) ]
 *: Skip
 
 [ $arch == simarm ]
 *: Skip
 
 [ $arch == arm ]
 *: Skip
 
 [ $compiler == dart2js && $checked ]
 *: Skip
 
 [ $compiler == dart2js ]
 math_parse_double_test: Fail # Expect.equals(expected: <78187493520>, actual: <0>)
 math_test: Fail # issue 3333
+apply_test: Fail # issue 5669
 
 # Bad test, assumes RegExp.allMatches returns a Collection.
 reg_exp_all_matches_test: Fail, OK # NoSuchMethodError : method not found: 'forEach'
 
 reg_exp4_test: Fail, OK # Expects exception from const constructor.
 
 big_integer_vm_test: Fail, OK # VM specific test.
 compare_to2_test: Fail, OK    # Requires bigint support.
 string_base_vm_test: Fail, OK # VM specific test.
 
 null_nosuchmethod_test: Fail # Bug 5513
 
 [ $compiler == dart2js && $runtime == none ]
 *: Fail, Pass # TODO(ahe): Triage these tests.
 
 [ $compiler == dart2js && $runtime == safari ]
 core_runtime_types_test: Fail
 
 [ $compiler == dart2js && $runtime == ff && $system == windows ]
 null_test: Fail # http://dartbug.com/5523
 
 [ $compiler == dart2js && $runtime == ie ]
 date_time7_test: Fail # BUG(3304): Maybe this doesn't time out?
 reg_exp_all_matches_test: Fail # BUG(3304): Maybe this doesn't time out?
 string_base_vm_test: Fail # BUG(3304): Maybe this doesn't time out?
 
 [ $compiler == dart2dart ]
 # Skip until we stabilize language tests.
 *: Skip