Add documentationComment for Class to Kernel. Parse it. Resynthesize in Analyzer.

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

Index: pkg/analyzer/test/src/summary/resynthesize_common.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_common.dart b/pkg/analyzer/test/src/summary/resynthesize_common.dart
index 6aacdf5afb7fb7d02cd3acaeb07a384034ddec71..cb2c82c4d15a89e6b398bc603155ba2c4079342f 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_common.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_common.dart
@@ -2113,28 +2113,17 @@ class C {
 
   test_class_documented() async {
     var library = await checkLibrary('''
-// Extra comment so doc comment offset != 0
 /**
  * Docs
  */
 class C {}''');
-    if (isStrongMode) {
-      checkElementText(library, r'''
-/**
- * Docs
- */
-class C {
-}
-''');
-    } else {
-      checkElementText(library, r'''
+    checkElementText(library, r'''
 /**
  * Docs
  */
 class C {
 }
 ''');
-    }
   }
 
   test_class_documented_tripleSlash() async {
@@ -2219,6 +2208,22 @@ class C {
     }
   }
 
+  test_class_documented_withLeadingNotDocumentation() async {
+    var library = await checkLibrary('''
+// Extra comment so doc comment offset != 0
+/**
+ * Docs
+ */
+class C {}''');
+    checkElementText(library, r'''
+/**
+ * Docs
+ */
+class C {
+}
+''');
+  }
+
   test_class_field_const() async {
     var library = await checkLibrary('class C { static const int i = 0; }');
     if (isStrongMode) {