Implement flag and source getters on RegExp.prototype.

test/test262/test262.status

Index: test/test262/test262.status
diff --git a/test/test262/test262.status b/test/test262/test262.status
index a5c4047841b22de4529ed7eab8d4007275eacca3..dd9a3a03e0f174e9474e7a361465611852edad09 100644
--- a/test/test262/test262.status
+++ b/test/test262/test262.status
@@ -144,24 +144,6 @@
   'built-ins/WeakMap/iterator-items-are-not-object-close-iterator': [FAIL],
   'built-ins/WeakSet/iterator-close-after-add-failure': [FAIL],
 
-  # https://code.google.com/p/v8/issues/detail?id=3715
-  'built-ins/Object/getOwnPropertyDescriptor/15.2.3.3-4-212': [FAIL],
-  'built-ins/Object/getOwnPropertyDescriptor/15.2.3.3-4-213': [FAIL],
-  'built-ins/Object/getOwnPropertyDescriptor/15.2.3.3-4-214': [FAIL],
-  'built-ins/Object/getOwnPropertyDescriptor/15.2.3.3-4-215': [FAIL],
-  'built-ins/RegExp/prototype/global/15.10.7.2-1': [FAIL],
-  'built-ins/RegExp/prototype/global/15.10.7.2-2': [FAIL],
-  'built-ins/RegExp/prototype/global/S15.10.7.2_A9': [FAIL],
-  'built-ins/RegExp/prototype/ignoreCase/15.10.7.3-1': [FAIL],
-  'built-ins/RegExp/prototype/ignoreCase/15.10.7.3-2': [FAIL],
-  'built-ins/RegExp/prototype/ignoreCase/S15.10.7.3_A9': [FAIL],
-  'built-ins/RegExp/prototype/multiline/15.10.7.4-1': [FAIL],
-  'built-ins/RegExp/prototype/multiline/15.10.7.4-2': [FAIL],
-  'built-ins/RegExp/prototype/multiline/S15.10.7.4_A9': [FAIL],
-  'built-ins/RegExp/prototype/source/15.10.7.1-1': [FAIL],
-  'built-ins/RegExp/prototype/source/15.10.7.1-2': [FAIL],
-  'built-ins/RegExp/prototype/source/S15.10.7.1_A9': [FAIL],
-
   # https://code.google.com/p/v8/issues/detail?id=4243
   'built-ins/Promise/race/S25.4.4.3_A3.1_T2': [FAIL],
   'built-ins/Promise/reject/S25.4.4.4_A3.1_T1': [FAIL],
@@ -181,16 +163,6 @@
   'built-ins/RegExp/from-regexp-like-get-ctor-err': [FAIL],
   'built-ins/RegExp/call_with_regexp_not_same_constructor': [FAIL],
 
-  # https://code.google.com/p/v8/issues/detail?id=4528
-  'built-ins/RegExp/prototype/source/S15.10.7.1_A8': [FAIL],
-  'built-ins/RegExp/prototype/source/S15.10.7.1_A10': [FAIL],
-  'built-ins/RegExp/prototype/global/S15.10.7.2_A8': [FAIL],
-  'built-ins/RegExp/prototype/global/S15.10.7.2_A10': [FAIL],
-  'built-ins/RegExp/prototype/ignoreCase/S15.10.7.3_A8': [FAIL],
-  'built-ins/RegExp/prototype/ignoreCase/S15.10.7.3_A10': [FAIL],
-  'built-ins/RegExp/prototype/multiline/S15.10.7.4_A8': [FAIL],
-  'built-ins/RegExp/prototype/multiline/S15.10.7.4_A10': [FAIL],
-
   # https://code.google.com/p/v8/issues/detail?id=4006
   'built-ins/String/prototype/S15.5.4_A1': [FAIL],
   'built-ins/String/prototype/S15.5.4_A2': [FAIL],
@@ -380,11 +352,7 @@
   'built-ins/RegExp/prototype/test/u-captured-value': [FAIL],
   'built-ins/RegExp/prototype/test/u-lastindex-adv': [FAIL],
   'built-ins/RegExp/prototype/test/u-lastindex-value': [FAIL],
-  'built-ins/RegExp/prototype/unicode/length': [FAIL],
   'built-ins/RegExp/prototype/unicode/name': [FAIL],
-  'built-ins/RegExp/prototype/unicode/prop-desc': [FAIL],
-  'built-ins/RegExp/prototype/unicode/this-invald-obj': [FAIL],
-  'built-ins/RegExp/prototype/unicode/this-non-obj': [FAIL],
   'built-ins/RegExp/prototype/unicode/this-regexp': [FAIL],
   'built-ins/RegExp/unicode_identity_escape': [FAIL],
   'language/literals/regexp/u-unicode-esc': [FAIL],
@@ -395,9 +363,6 @@
   # https://code.google.com/p/v8/issues/detail?id=4342
   'built-ins/RegExp/prototype/exec/get-sticky-coerce': [FAIL],
   'built-ins/RegExp/prototype/exec/get-sticky-err': [FAIL],
-  'built-ins/RegExp/prototype/sticky/prop-desc': [FAIL],
-  'built-ins/RegExp/prototype/sticky/this-invalid-obj': [FAIL],
-  'built-ins/RegExp/prototype/sticky/this-non-obj': [FAIL],
   'built-ins/RegExp/prototype/test/get-sticky-coerce': [FAIL],
   'built-ins/RegExp/prototype/test/get-sticky-err': [FAIL],
   'built-ins/RegExp/valid-flags-y': [FAIL],
@@ -441,7 +406,6 @@
 
   # https://code.google.com/p/v8/issues/detail?id=4346
   'built-ins/RegExp/prototype/flags/name': [FAIL],
-  'built-ins/RegExp/prototype/flags/y-attr-err': [FAIL],
   'built-ins/RegExp/prototype/flags/u': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=4347