Fix setting array length to be ES5 conform.

test/test262/test262.status

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 362 matching lines @@
 15.2.3.6-4-619: FAIL
 # Bug? ES5 Attributes - all attributes in Array.prototype.reduceRight are
 #      correct
 15.2.3.6-4-620: FAIL
 # Bug? ES5 Attributes - all attributes in String.prototype.trim are correct
 15.2.3.6-4-621: FAIL
 # Bug? ES5 Attributes - all attributes in Date.prototype.toISOString are correct
 15.2.3.6-4-623: FAIL
 # Bug? ES5 Attributes - all attributes in Date.prototype.toJSON are correct
 15.2.3.6-4-624: FAIL
-# Bug? Array.prototype.indexOf - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.14-9-a-19: FAIL
-# Bug? Array.prototype.lastIndexOf - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.15-8-a-19: FAIL
-# Bug? Array.prototype.every - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.16-7-b-16: FAIL
-# Bug? Array.prototype.some - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.17-7-b-16: FAIL
-# Bug? Array.prototype.forEach - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.18-7-b-16: FAIL
-# Bug? Array.prototype.map - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.19-8-b-16: FAIL
-# Bug? Array.prototype.filter - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.20-9-b-16: FAIL
-# Bug? Array.prototype.reduce - decreasing length of array in step 8 does not
-#      delete non-configurable properties
-15.4.4.21-9-b-16: FAIL
-# Bug? Array.prototype.reduce - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.21-9-b-29: FAIL
-# Bug? Array.prototype.reduceRight - decreasing length of array in step 8 does
-#      not delete non-configurable properties
-15.4.4.22-9-b-16: FAIL
-# Bug? Array.prototype.reduceRight - decreasing length of array does not delete
-#      non-configurable properties
-15.4.4.22-9-b-29: FAIL
 
 ############################ SKIPPED TESTS #############################
 
 # These tests take a looong time to run in debug mode.
 S15.1.3.2_A2.5_T1: PASS, SKIP if $mode == debug
 S15.1.3.1_A2.5_T1: PASS, SKIP if $mode == debug
 
 [ $arch == arm ]
 
 # BUG(3251225): Tests that timeout with --nocrankshaft.
 S15.1.3.1_A2.5_T1: SKIP
 S15.1.3.2_A2.5_T1: SKIP
 S15.1.3.1_A2.4_T1: SKIP
 S15.1.3.1_A2.5_T1: SKIP
 S15.1.3.2_A2.4_T1: SKIP
 S15.1.3.2_A2.5_T1: SKIP
 S15.1.3.3_A2.3_T1: SKIP
 S15.1.3.4_A2.3_T1: SKIP
 S15.1.3.1_A2.5_T1: SKIP
 S15.1.3.2_A2.5_T1: SKIP
 
 [ $arch == mips ]
 
 # Skip all tests on MIPS.
 *: SKIP