Fix regression in import fixups introduced by .packages support.

pkg/analysis_server/lib/src/services/correction/util.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 services.src.correction.util;
 
 import 'dart:math';
 
 import 'package:analysis_server/src/protocol.dart'
     show SourceChange, SourceEdit;
@@ skipping 86 matching lines @@
 
 /**
  * Attempts to convert the given absolute path into an absolute URI, such as
  * "dart" or "package" URI.
  *
  * [context] - the [AnalysisContext] to work in.
  * [path] - the absolute path, not `null`.
  *
  * Returns the absolute (non-file) URI or `null`.
  */
-String findAbsoluteUri(AnalysisContext context, String path) {
-  Source fileSource = new NonExistingSource(path, null, UriKind.FILE_URI);
+String findNonFileUri(AnalysisContext context, String path) {
+  Source fileSource =
+      new NonExistingSource(path, toUri(path), UriKind.FILE_URI);
   Uri uri = context.sourceFactory.restoreUri(fileSource);
-  if (uri == null) {
+  if (uri == null || uri.scheme == 'file') {
     return null;
   }
   return uri.toString();
 }
 
 /**
  * Returns the EOL to use for the given [code].
  */
 String getCodeEndOfLine(String code) {
   if (code.contains('\r\n')) {
@@ skipping 1441 matching lines @@
 
   @override
   Object visitExpression(Expression node) {
     if (node is BinaryExpression && node.operator.type == groupOperatorType) {
       return super.visitNode(node);
     }
     operands.add(node);
     return null;
   }
 }