- Change "static final" to "static const" in the lib/ directory.

lib/compiler/implementation/ssa/tracer.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('tracer');
 
 #import('dart:io');
 #import('ssa.dart');
 #import('../js_backend/js_backend.dart');
 #import('../leg.dart');
 
-final bool GENERATE_SSA_TRACE = false;
-final String SSA_TRACE_FILTER = null;
+const bool GENERATE_SSA_TRACE = false;
+const String SSA_TRACE_FILTER = null;
 
 class HTracer extends HGraphVisitor implements Tracer {
   JavaScriptItemCompilationContext context;
   int indent = 0;
   final RandomAccessFile output;
   final bool enabled = GENERATE_SSA_TRACE;
   bool traceActive = false;
 
   HTracer([String path = "dart.cfg"])
       : output = GENERATE_SSA_TRACE ? new File(path).openSync(FileMode.WRITE)
@@ skipping 492 matching lines @@
 
   String visitIs(HIs node) {
     String type = node.typeExpression.toString();
     return "TypeTest: ${temporaryId(node.expression)} is $type";
   }
 
   String visitTypeConversion(HTypeConversion node) {
     return "TypeConversion: ${temporaryId(node.inputs[0])} to ${node.type}";
   }
 }