Convert all the generated tests to reflective.

pkg/analyzer/lib/src/generated/ast.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.ast;
 
 import 'dart:collection';
@@ skipping 16030 matching lines @@
   /**
    * Return the value of the literal.
    *
    * @return the value of the literal
    */
   String get value => _value;
 
   @override
   bool get isMultiline {
     String lexeme = literal.lexeme;
-    if (lexeme.length < 6) {
+    if (lexeme.length < 3) {
       return false;
     }
     // skip 'r'
     int offset = 0;
-    if (lexeme.codeUnitAt(0) == 0x72) {
+    if (isRaw) {
       offset = 1;
     }
     // check prefix
     return StringUtilities.startsWith3(lexeme, offset, 0x22, 0x22, 0x22) ||
         StringUtilities.startsWith3(lexeme, offset, 0x27, 0x27, 0x27);
   }
 
   @override
   bool get isRaw => literal.lexeme.codeUnitAt(0) == 0x72;
 
@@ skipping 3641 matching lines @@
     _elements[index] = node;
   }
   void clear() {
     _elements = <E> [];
   }
   int get length => _elements.length;
   void set length(int value) {
     throw new UnsupportedError("Cannot resize NodeList.");
   }
 }