Remove a few warnings.

lib/compiler/implementation/tools/mini_parser.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.
 
 #library('parser');
 
 #import('dart:io');
 
 #import('../../../utf/utf.dart');
 
 #import('../elements/elements.dart');
 #import('../scanner/scanner_implementation.dart');
 #import('../scanner/scannerlib.dart');
 #import('../tree/tree.dart');
 #import('../util/characters.dart');
 #import('../source_file.dart');
+#import('../ssa/ssa.dart');
 
 #source('../diagnostic_listener.dart');
 #source('../scanner/byte_array_scanner.dart');
 #source('../scanner/byte_strings.dart');
 
 int charCount = 0;
 Stopwatch stopwatch;
 
 void main() {
   toolMain(new Options().arguments);
@@ skipping 293 matching lines @@
   set text(String newText) {
     throw "not supported";
   }
 }
 
 class Mock {
   const Mock();
   bool get useColors() => true;
   internalError(message) { throw message.toString(); }
 }