Parse documentation for class aliases, fix for /// comments.

pkg/analyzer/test/src/summary/resynthesize_kernel_test.dart

Index: pkg/analyzer/test/src/summary/resynthesize_kernel_test.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_kernel_test.dart b/pkg/analyzer/test/src/summary/resynthesize_kernel_test.dart
index 637d79607cfe73b9ff344949d19f95a58273a0bd..7500ca4c659b53643cef72d439772f501a2dcce0 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_kernel_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_kernel_test.dart
@@ -109,11 +109,6 @@ class ResynthesizeKernelStrongTest extends ResynthesizeTest {
   }
 
   @failingTest
-  test_class_alias_documented() async {
-    await super.test_class_alias_documented();
-  }
-
-  @failingTest
   test_class_alias_with_forwarding_constructors_type_substitution() async {
     await super
         .test_class_alias_with_forwarding_constructors_type_substitution();
@@ -133,16 +128,6 @@ class ResynthesizeKernelStrongTest extends ResynthesizeTest {
   }
 
   @failingTest
-  test_class_documented_tripleSlash() async {
-    await super.test_class_documented_tripleSlash();
-  }
-
-  @failingTest
-  test_class_documented_withLeadingNotDocumentation() async {
-    await super.test_class_documented_withLeadingNotDocumentation();
-  }
-
-  @failingTest
   test_class_interfaces_unresolved() async {
     await super.test_class_interfaces_unresolved();
   }