Fix dart/tools directory to remove @'raw string' and foo.dynamic.

tools/testing/legpad/legpad.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.
 
 #import("dart:html", prefix:"html");
 #import('../../../lib/compiler/compiler.dart', prefix: "compiler_lib");
 #import('../../../lib/uri/uri.dart', prefix:"uri_lib");
 
 /**
  * This is the entrypoint for a version of the leg compiler that
  * runs in the browser.
  *
  * Because this is running in the browser, we do not access
  * the file system.  Instead, we assume that all necessary files
  * have been placed in inert <script> elements somewhere on the html page.
  *
  * (See legpad.py for more details on how the html page is constructed.)
  */
 void main() {
   new Legpad().run();
 }
 
 class Legpad {
   // id of script element containing name of the main dart file
   // to compile
-  static final String MAIN_ID = "main_id";
+  static const String MAIN_ID = "main_id";
 
   Legpad() : warnings = new StringBuffer();
 
   // accumulates diagnostic messages emitted by the leg compiler
   StringBuffer warnings;
 
   // the generated javascript
   String output;
 
   String readAll(String filename) {
@@ skipping 90 matching lines @@
     }
     return element.text.trim();
   }
 
   // TODO(mattsh): should exist in standard lib somewhere
   static String htmlEscape(String text) {
     return text.replaceAll('&', '&amp;').replaceAll(
         '>', '&gt;').replaceAll('<', '&lt;');
   }
 }