Resynthesize ClassElementImpl fields and property accessors lazily.

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

Index: pkg/analyzer/test/src/summary/resynthesize_test.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_test.dart b/pkg/analyzer/test/src/summary/resynthesize_test.dart
index 7e682a9bf25c43f04f9e0254a64f68fa6f61aea4..2fec70b384eccbbc648b3eef6915d1bdd4ebe514 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_test.dart
@@ -233,9 +233,11 @@ abstract class AbstractResynthesizeTest extends AbstractSingleUnitTest {
     }
     expect(r.accessors.length, o.accessors.length,
         reason: '$desc accessors.length');
+    List<PropertyAccessorElement> rAccessors = _getSortedPropertyAccessors(r);
+    List<PropertyAccessorElement> oAccessors = _getSortedPropertyAccessors(o);
     for (int i = 0; i < r.accessors.length; i++) {
-      comparePropertyAccessorElements(r.accessors[i], o.accessors[i],
-          '$desc accessor ${o.accessors[i].name}');
+      comparePropertyAccessorElements(
+          rAccessors[i], oAccessors[i], '$desc accessor ${oAccessors[i].name}');
     }
     expect(r.methods.length, o.methods.length, reason: '$desc methods.length');
     for (int i = 0; i < r.methods.length; i++) {
@@ -1237,6 +1239,13 @@ abstract class AbstractResynthesizeTest extends AbstractSingleUnitTest {
     expect(identifier.staticElement, isNull, reason: desc);
   }
 
+  List<PropertyAccessorElement> _getSortedPropertyAccessors(
+      ClassElement classElement) {
+    List<PropertyAccessorElement> accessors = classElement.accessors.toList();
+    accessors.sort((a, b) => a.displayName.compareTo(b.displayName));
+    return accessors;
+  }
+
   bool _hasModifier(Element element, Modifier modifier) {
     if (modifier == Modifier.ABSTRACT) {
       if (element is ClassElement) {