Remove UriReferencedElement with its uri/uriOffset/uriEnd properties.

pkg/analysis_server/lib/src/services/refactoring/refactoring.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.
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/refactoring/convert_getter_to_method.dart';
 import 'package:analysis_server/src/services/refactoring/convert_method_to_getter.dart';
 import 'package:analysis_server/src/services/refactoring/extract_local.dart';
@@ skipping 345 matching lines @@
       element = (element as PropertyAccessorElement).variable;
     }
     if (element.enclosingElement is CompilationUnitElement) {
       return new RenameUnitMemberRefactoringImpl(searchEngine, element);
     }
     if (element is ConstructorElement) {
       return new RenameConstructorRefactoringImpl(
           searchEngine, astProvider, element);
     }
     if (element is ImportElement) {
-      return new RenameImportRefactoringImpl(searchEngine, element);
+      return new RenameImportRefactoringImpl(
+          searchEngine, astProvider, element);
     }
     if (element is LabelElement) {
       return new RenameLabelRefactoringImpl(searchEngine, element);
     }
     if (element is LibraryElement) {
       return new RenameLibraryRefactoringImpl(searchEngine, element);
     }
     if (element is LocalElement) {
       return new RenameLocalRefactoringImpl(searchEngine, astProvider, element);
     }
@@ skipping 57 matching lines @@
       _map[unitElement] = unit;
     }
     return unit;
   }
 
   CompilationUnitElement getUnitElement(Element element) {
     return element.getAncestor((e) => e is CompilationUnitElement)
         as CompilationUnitElement;
   }
 }