Fixes for formatting and complete completion stub.

pkg/analysis_server/lib/src/edit/edit_domain.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 edit.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/assist/assist_core.dart';
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
@@ skipping 54 matching lines @@
     _newRefactoringManager();
   }
 
   Response format(Request request) {
     EditFormatParams params = new EditFormatParams.fromRequest(request);
     String file = params.file;
 
     String unformattedSource;
     try {
       Source source = server.resourceProvider.getFile(file).createSource();
-      unformattedSource = server.overlayState.getContents(source);
+      if (server.options.enableNewAnalysisDriver) {
+        unformattedSource = server.fileContentOverlay[file];
+      } else {
+        unformattedSource = server.overlayState.getContents(source);
+      }
       unformattedSource ??= source.contents.data;
     } catch (e) {
       return new Response.formatInvalidFile(request);
     }
 
     int start = params.selectionOffset;
     int length = params.selectionLength;
 
     // No need to preserve 0,0 selection
     if (start == 0 && length == 0) {
@@ skipping 720 matching lines @@
     }
     return new RefactoringStatus();
   }
 }
 
 /**
  * [_RefactoringManager] throws instances of this class internally to stop
  * processing in a manager that was reset.
  */
 class _ResetError {}