Migrate test block 11 to Dart 2.0.

tests/corelib/corelib.status

Index: tests/corelib/corelib.status
diff --git a/tests/corelib/corelib.status b/tests/corelib/corelib.status
index a8a8ace567e9f1bf740915c8a87b9383f8a9a4dc..84fc9d613b85c8de33aa51e7839c140fca3535b9 100644
--- a/tests/corelib/corelib.status
+++ b/tests/corelib/corelib.status
@@ -19,8 +19,6 @@ string_trimlr_test/02: RuntimeError # Uses Unicode 6.2.0 or earlier.
 [ $compiler == dart2js && ! $dart2js_with_kernel ]
 error_stack_trace1_test: RuntimeError # Issue 12399
 integer_to_string_test/01: RuntimeError # Issue 1533
-iterable_return_type_test/01: RuntimeError # Issue 20085
-iterable_return_type_test/02: RuntimeError # Dart2js does not support Uint64*.
 
 big_integer_*: Skip # VM specific test.
 compare_to2_test: RuntimeError, OK    # Requires bigint support.
@@ -123,20 +121,6 @@ iterable_expand_test: Crash
 iterable_first_test: Crash
 iterable_first_where_test: Crash
 iterable_fold_test: Crash
-iterable_generate_test/01: Crash
-iterable_generate_test/none: Crash
-iterable_join_test: Crash
-iterable_last_test: Crash
-iterable_last_where_test: Crash
-iterable_length_test: Crash
-iterable_mapping_test: Crash
-iterable_reduce_test: Crash
-iterable_return_type_test/01: Crash
-iterable_return_type_test/02: Crash
-iterable_return_type_test/none: Crash
-iterable_single_test: Crash
-iterable_single_where_test: Crash
-iterable_skip_test: Crash
 iterable_skip_while_test: Crash
 iterable_take_test: Crash
 iterable_take_while_test: Crash
@@ -264,20 +248,6 @@ iterable_expand_test: Crash
 iterable_first_test: Crash
 iterable_first_where_test: Crash
 iterable_fold_test: Crash
-iterable_generate_test/01: Crash
-iterable_generate_test/none: Crash
-iterable_join_test: Crash
-iterable_last_test: Crash
-iterable_last_where_test: Crash
-iterable_length_test: Crash
-iterable_mapping_test: Crash
-iterable_reduce_test: Crash
-iterable_return_type_test/01: Crash
-iterable_return_type_test/02: Crash
-iterable_return_type_test/none: Crash
-iterable_single_test: Crash
-iterable_single_where_test: Crash
-iterable_skip_test: Crash
 iterable_skip_while_test: Crash
 iterable_take_test: Crash
 iterable_take_while_test: Crash