Changes to make leg build bots green

dart/frog/leg/ssa/types.dart

 // Copyright (c) 2011, 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 SsaTypePropagator extends HGraphVisitor {
+class SsaTypePropagator extends HGraphVisitor implements OptimizationPhase {
 
   final Map<int, HInstruction> workmap;
   final List<int> worklist;
   final Compiler compiler;
+  final String name = 'type propagator';
 
   SsaTypePropagator(Compiler this.compiler)
       : workmap = new Map<int, HInstruction>(),
         worklist = new List<int>();
 
   void visitGraph(HGraph graph) {
     new TypeAnnotationReader(compiler).visitGraph(graph);
     visitDominatorTree(graph);
     processWorklist();
   }
@@ skipping 61 matching lines @@
       parameter.type = HType.INTEGER;
     } else if (type.toString() == 'String') {
       parameter.type = HType.STRING;
     }
   }
 
   void visitGraph(HGraph graph) {
     visitDominatorTree(graph);
   }
 }