Add DartType.treatAsRaw to treat List<dynamic> as List in the backend.

sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart

 // Copyright (c) 2012, 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.
 
 part of dart_backend;
 
 Function get _compareNodes =>
     compareBy((n) => n.getBeginToken().charOffset);
 
 typedef String _Renamer(Renamable renamable);
@@ skipping 72 matching lines @@
       f(element, map[element]);
     }
   }
 
   String renameType(DartType type, Function renameElement) {
     // TODO(smok): Do not rename type if it is in platform library or
     // js-helpers.
     StringBuffer result = new StringBuffer(renameElement(type.element));
     if (type is InterfaceType) {
       InterfaceType interfaceType = type;
-      if (!interfaceType.isRaw) {
+      if (!interfaceType.treatAsRaw) {
         result.write('<');
         Link<DartType> argumentsLink = interfaceType.typeArguments;
         result.write(renameType(argumentsLink.head, renameElement));
         for (Link<DartType> link = argumentsLink.tail; !link.isEmpty;
              link = link.tail) {
           result.write(',');
           result.write(renameType(link.head, renameElement));
         }
         result.write('>');
       }
@@ skipping 245 matching lines @@
     index ~/= firstCharAlphabet.length;
     int length = otherCharsAlphabet.length;
     while (index >= length) {
       resultBuilder.write(otherCharsAlphabet[index % length]);
       index ~/= length;
     }
     resultBuilder.write(otherCharsAlphabet[index]);
     return resultBuilder.toString();
   }
 }