Migrated test block 19 to Dart 2.0.

tests/corelib_strong/corelib_strong.status

Index: tests/corelib_strong/corelib_strong.status
diff --git a/tests/corelib_strong/corelib_strong.status b/tests/corelib_strong/corelib_strong.status
index 8f266f26cd5f6cd60585c032eb039c044f18b648..d9bc3ad98dd8f57531ad73d83bdbde133b0e3eb3 100644
--- a/tests/corelib_strong/corelib_strong.status
+++ b/tests/corelib_strong/corelib_strong.status
@@ -56,12 +56,6 @@ main_test: RuntimeError # Issue 29921
 map_keys2_test: RuntimeError # Issue 29921
 nan_infinity_test/01: RuntimeError # Issue 29921
 null_nosuchmethod_test: RuntimeError # Issue 29921
-regexp/alternative-length-miscalculation_test: RuntimeError # Issue 29921
-regexp/ascii-regexp-subject_test: RuntimeError # Issue 29921
-regexp/bol-with-multiline_test: RuntimeError # Issue 29921
-regexp/capture-3_test: RuntimeError # Issue 29921
-regexp/char-insensitive_test: RuntimeError # Issue 29921
-regexp/character-match-out-of-order_test: RuntimeError # Issue 29921
 regexp/compile-crash_test: RuntimeError # Issue 29921
 regexp/default_arguments_test: RuntimeError # Issue 29921
 regexp/early-acid3-86_test: RuntimeError # Issue 29921
@@ -71,7 +65,6 @@ regexp/extended-characters-more_test: RuntimeError # Issue 29921
 regexp/find-first-asserted_test: RuntimeError # Issue 29921
 regexp/invalid-range-in-class_test: RuntimeError # Issue 29921
 regexp/look-ahead_test: RuntimeError # Issue 29921
-regexp/loop-capture_test: RuntimeError # Issue 29921
 regexp/malformed-escapes_test: RuntimeError # Issue 29921
 regexp/many-brackets_test: RuntimeError # Issue 29921
 regexp/negative-special-characters_test: RuntimeError # Issue 29921