Use getResolvedCompilationUnit2() instead of resolveCompilationUnit2() in QuickAssist and QuickFix …

pkg/analysis_server/lib/plugin/edit/fix/fix_dart.dart

 // Copyright (c) 2015, 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 analysis_server.plugin.edit.fix.fix_dart;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/src/services/correction/fix_internal.dart'
@@ skipping 26 matching lines @@
     AnalysisContext analysisContext = context.analysisContext;
     Source source = context.error.source;
     if (!AnalysisEngine.isDartFileName(source.fullName)) {
       return Fix.EMPTY_LIST;
     }
     List<Source> libraries = analysisContext.getLibrariesContaining(source);
     if (libraries.isEmpty) {
       return Fix.EMPTY_LIST;
     }
     CompilationUnit unit =
-        analysisContext.resolveCompilationUnit2(source, libraries[0]);
+        analysisContext.getResolvedCompilationUnit2(source, libraries[0]);
     if (unit == null) {
       return Fix.EMPTY_LIST;
     }
     DartFixContext dartContext = new DartFixContextImpl(context, unit);
     return internalComputeFixes(dartContext);
   }
 
   /**
    * Return a list of fixes for the given [context].
    */
   Future<List<Fix>> internalComputeFixes(DartFixContext context);
 }