fix for #520, ListMixin should work again

test/browser/language_tests.js

Index: test/browser/language_tests.js
diff --git a/test/browser/language_tests.js b/test/browser/language_tests.js
index 68832d7fc6a6764158a7436b7510828d6dce759c..838a39702a41ad4cd109c62a04a8f3d4cf3ec998 100644
--- a/test/browser/language_tests.js
+++ b/test/browser/language_tests.js
@@ -382,7 +382,6 @@
       'bit_twiddling_bigint_test': fail,
       'bool_from_environment_test': fail,
       'collection_length_test': skip_timeout,
-      'collection_removes_test': fail,
       'collection_to_string_test': fail,
       'compare_to2_test': fail,
       'const_list_literal_test': fail,
@@ -418,14 +417,12 @@
       'integer_to_radix_string_test': fail,
       'integer_to_string_test_01_multi': fail,
       'iterable_empty_test': fail,
-      'iterable_expand_test': fail,
       'iterable_generate_test': fail,
       'iterable_return_type_test_01_multi': fail,
       'iterable_return_type_test_02_multi': fail,
       'iterable_return_type_test_none_multi': fail,
       'json_map_test': fail,
       'list_fill_range_test': fail,
-      'list_get_range_test': fail,
       'list_replace_range_test': fail,
       'list_set_all_test': fail,
       'list_to_string2_test': fail,
@@ -442,9 +439,9 @@
       'throw_half_surrogate_pair_test_02_multi': fail,
       'stacktrace_current_test': fail,
       'stacktrace_fromstring_test': fail,
+      'string_fromcharcodes_test': skip_fail, // timeouts

[Jennifer Messerly, 2016/05/04 20:58:08]

will change to: skip_timeout

(just noticed it)

       'string_from_environment2_test': fail,
       'string_from_environment_test': fail,
-      'string_fromcharcodes_test': fail,
       'string_operations_with_null_test': fail,
       'symbol_reserved_word_test_06_multi': fail,
       'symbol_reserved_word_test_09_multi': fail,