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

lib/compiler/implementation/ssa/codegen.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.
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
 
   SsaCodeGeneratorTask(JavaScriptBackend backend)
       : this.backend = backend,
@@ skipping 113 matching lines @@
    * a subgraph.
    * - [TYPE_STATEMENT] means that the graph must be generated as a statement,
    * which is always possible.
    * - [TYPE_EXPRESSION] means that the graph can be generated as an expression,
    * or possibly several comma-separated expressions.
    * - [TYPE_DECLARATION] means that the graph can be generated as an
    * expression, and that it only generates expressions of the form
    *   variable = expression
    * which are also valid as parts of a "var" declaration.
    */
-  static final int TYPE_STATEMENT = 0;
-  static final int TYPE_EXPRESSION = 1;
-  static final int TYPE_DECLARATION = 2;
+  static const int TYPE_STATEMENT = 0;
+  static const int TYPE_EXPRESSION = 1;
+  static const int TYPE_DECLARATION = 2;
 
   /**
    * Whether we are currently generating expressions instead of statements.
    * This includes declarations, which are generated as expressions.
    */
   bool isGeneratingExpression = false;
 
   final JavaScriptBackend backend;
   final WorkItem work;
   final HTypeMap types;
@@ skipping 2758 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }