Implement getClassAsInstanceOf() and getTypeAsInstanceOf() for IncrementalClassHierarchy.

pkg/kernel/test/class_hierarchy_test.dart

Index: pkg/kernel/test/class_hierarchy_test.dart
diff --git a/pkg/kernel/test/class_hierarchy_test.dart b/pkg/kernel/test/class_hierarchy_test.dart
index 40f674c4c1a19b9c31f400ec1220c9c609ab5c19..56b4eb64b27e2b4296b42f2fa7b1b7bc5c279293 100644
--- a/pkg/kernel/test/class_hierarchy_test.dart
+++ b/pkg/kernel/test/class_hierarchy_test.dart
@@ -48,36 +48,6 @@ class IncrementalClassHierarchyTest extends _ClassHierarchyTest {
   }
 
   @failingTest
-  void test_getClassAsInstanceOf_generic_extends() {
-    super.test_getClassAsInstanceOf_generic_extends();
-  }
-
-  @failingTest
-  void test_getClassAsInstanceOf_generic_implements() {
-    super.test_getClassAsInstanceOf_generic_implements();
-  }
-
-  @failingTest
-  void test_getClassAsInstanceOf_generic_with() {
-    super.test_getClassAsInstanceOf_generic_with();
-  }
-
-  @failingTest
-  void test_getClassAsInstanceOf_notGeneric_extends() {
-    super.test_getClassAsInstanceOf_notGeneric_extends();
-  }
-
-  @failingTest
-  void test_getClassAsInstanceOf_notGeneric_implements() {
-    super.test_getClassAsInstanceOf_notGeneric_implements();
-  }
-
-  @failingTest
-  void test_getClassAsInstanceOf_notGeneric_with() {
-    super.test_getClassAsInstanceOf_notGeneric_with();
-  }
-
-  @failingTest
   void test_getClassicLeastUpperBound_expansive() {
     super.test_getClassicLeastUpperBound_expansive();
   }
@@ -111,11 +81,6 @@ class IncrementalClassHierarchyTest extends _ClassHierarchyTest {
   void test_getInterfaceMember_implements() {
     super.test_getInterfaceMember_implements();
   }
-
-  @failingTest
-  void test_getTypeAsInstanceOf_generic_extends() {
-    super.test_getTypeAsInstanceOf_generic_extends();
-  }
 }
 
 abstract class _ClassHierarchyTest {