Issue 29109. Resynthesize PrefixElement(s) to fix constants evaluation.

pkg/analyzer/test/generated/non_error_resolver_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.test.generated.non_error_resolver_test;
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
@@ skipping 1293 matching lines @@
 
   test_const_dynamic() async {
     Source source = addSource('''
 const Type d = dynamic;
 ''');
     await computeAnalysisResult(source);
     assertNoErrors(source);
     verify([source]);
   }
 
+  test_const_imported_defaultParameterValue_withImportPrefix() async {
+    resetWith(options: new AnalysisOptionsImpl()..strongMode = true);
+    Source source = addNamedSource(
+        "/a.dart",
+        r'''
+import 'b.dart';
+const b = const B();
+''');
+    addNamedSource(
+        "/b.dart",
+        r'''
+import 'c.dart' as ccc;
+class B {
+  const B([p = ccc.value]);
+}
+''');
+    addNamedSource(
+        "/c.dart",
+        r'''
+const int value = 12345;
+''');
+    await computeAnalysisResult(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
   test_constConstructorWithNonConstSuper_explicit() async {
     Source source = addSource(r'''
 class A {
   const A();
 }
 class B extends A {
   const B(): super();
 }''');
     await computeAnalysisResult(source);
     assertNoErrors(source);
@@ skipping 5018 matching lines @@
     await computeAnalysisResult(source);
     assertNoErrors(source);
     verify([source]);
     reset();
   }
 
   Future<Null> _check_wrongNumberOfParametersForOperator1(String name) async {
     await _check_wrongNumberOfParametersForOperator(name, "a");
   }
 }