Migrated test block 12 to Dart 2.0.

tests/corelib_2/corelib_2.status

Index: tests/corelib_2/corelib_2.status
diff --git a/tests/corelib_2/corelib_2.status b/tests/corelib_2/corelib_2.status
index a6e8ffdac2ba11f6c08657c8e06807be7252a544..ac144bcd9fec1bbdc2eed320c5f8fed87dcb401e 100644
--- a/tests/corelib_2/corelib_2.status
+++ b/tests/corelib_2/corelib_2.status
@@ -81,6 +81,8 @@ compare_to2_test: RuntimeError # Issue 30170
 date_time10_test: RuntimeError # Issue 29921
 growable_list_test: RuntimeError # Issue 29921
 hash_set_test/01: RuntimeError # Issue 29921
+iterable_to_list_test/*: RuntimeError
+iterable_to_set_test: RuntimeError
 list_unmodifiable_test: RuntimeError
 list_test/none: RuntimeError
 list_test/01: RuntimeError
@@ -149,6 +151,7 @@ big_integer_parsed_arith_vm_test: RuntimeError # Issues 10245, 29921
 big_integer_parsed_div_rem_vm_test: RuntimeError # Issue 29921
 big_integer_parsed_mul_div_vm_test: RuntimeError # Issue 29921
 bit_twiddling_bigint_test: RuntimeError # Required bigint support.
+json_map_test: RuntimeError
 compare_to2_test: RuntimeError, OK # Requires bigint support.
 hash_set_test/01: RuntimeError # Issue 11551
 int_modulo_arith_test/bignum: RuntimeError # Issue 29921
@@ -171,6 +174,7 @@ error_stack_trace_test/nullThrown: RuntimeError # .stackTrace not present for ex
 list_removeat_test: RuntimeError # Issue 29921
 list_replace_range_test: RuntimeError # Issue 29921
 list_set_all_test: RuntimeError # Issue 29921
+json_map_test: RuntimeError # Issue 29921
 
 [ $runtime == flutter ]
 apply3_test: CompileTimeError # mirrors not supported
@@ -631,6 +635,15 @@ list_set_all_test: Crash
 list_set_range_test: Crash
 list_sort_test: RuntimeError
 list_sublist_test: Crash
+iterable_skip_while_test: Crash
+iterable_take_test: Crash
+iterable_take_while_test: Crash
+iterable_test: Crash
+iterable_to_list_test/01: Crash
+iterable_to_list_test/none: Crash
+iterable_to_set_test: Crash
+iterable_tostring_test: Crash
+json_map_test: Crash
 
 [ $compiler == dart2js && $dart2js_with_kernel && $host_checked ]
 stopwatch_test: Crash
@@ -827,6 +840,7 @@ package_resource_test: RuntimeError # Issue 26842
 
 [ $compiler == dart2js && ! $dart2js_with_kernel ]
 list_unmodifiable_test: Pass, RuntimeError # Issue 28712
+iterable_to_list_test/01: RuntimeError # Issue 26501
 
 [ $compiler == dartk && $runtime == vm ]
 list_map_test: DartkCompileTimeError