Probably don't need an unused re-implementation of addAll(). :)

pkg/analyzer/test/generated/utilities_test.dart

Index: pkg/analyzer/test/generated/utilities_test.dart
diff --git a/pkg/analyzer/test/generated/utilities_test.dart b/pkg/analyzer/test/generated/utilities_test.dart
index 87c58858680b420fd560a314460c2213477ba864..32b2487a806c6fbc36d60ac127ae8b3f464f617b 100644
--- a/pkg/analyzer/test/generated/utilities_test.dart
+++ b/pkg/analyzer/test/generated/utilities_test.dart
@@ -30,7 +30,6 @@ main() {
   runReflectiveTests(SourceRangeTest);
   runReflectiveTests(BooleanArrayTest);
   runReflectiveTests(DirectedGraphTest);
-  runReflectiveTests(ListUtilitiesTest);
   runReflectiveTests(MultipleMapIteratorTest);
   runReflectiveTests(SingleMapIteratorTest);
   runReflectiveTests(TokenMapTest);
@@ -2756,39 +2755,6 @@ class ListGetter_NodeReplacerTest_testSwitchMember_2
 }
 
 @reflectiveTest
-class ListUtilitiesTest {
-  void test_addAll_emptyToEmpty() {
-    List<String> list = new List<String>();
-    List<String> elements = <String>[];
-    ListUtilities.addAll(list, elements);
-    expect(list.length, 0);
-  }
-
-  void test_addAll_emptyToNonEmpty() {
-    List<String> list = new List<String>();
-    list.add("a");
-    List<String> elements = <String>[];
-    ListUtilities.addAll(list, elements);
-    expect(list.length, 1);
-  }
-
-  void test_addAll_nonEmptyToEmpty() {
-    List<String> list = new List<String>();
-    List<String> elements = ["b", "c"];
-    ListUtilities.addAll(list, elements);
-    expect(list.length, 2);
-  }
-
-  void test_addAll_nonEmptyToNonEmpty() {
-    List<String> list = new List<String>();
-    list.add("a");
-    List<String> elements = ["b", "c"];
-    ListUtilities.addAll(list, elements);
-    expect(list.length, 3);
-  }
-}
-
-@reflectiveTest
 class MultipleMapIteratorTest extends EngineTestCase {
   void test_multipleMaps_firstEmpty() {
     Map<String, String> map1 = new HashMap<String, String>();