dart2js cps: Introduce GetStatic/SetStatic.

pkg/compiler/lib/src/tree_ir/tree_ir_tracer.dart

 // Copyright (c) 2014, 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 tree_ir_tracer;
 
 import 'dart:async' show EventSink;
 import '../tracer.dart';
 import 'tree_ir_nodes.dart';
 
@@ skipping 482 matching lines @@
   String visitSetField(SetField node) {
     String object = visitExpression(node.object);
     String field = node.field.name;
     if (usesInfixNotation(node.object)) {
       object = '($object)';
     }
     String value = visitExpression(node.value);
     return '$object.$field = $value';
   }
 
+  String visitGetStatic(GetStatic node) {
+    String element = node.element.name;
+    return element;
+  }
+
+  String visitSetStatic(SetStatic node) {
+    String element = node.element.name;
+    String value = visitExpression(node.value);
+    return '$element = $value';
+  }
+
   String visitCreateBox(CreateBox node) {
     return 'CreateBox';
   }
 
   String visitCreateInstance(CreateInstance node) {
     String className = node.classElement.name;
     String arguments = node.arguments.map(visitExpression).join(', ');
     return 'CreateInstance $className($arguments)';
   }
 
@@ skipping 38 matching lines @@
       String prefix = v.element == null ? 'v' : '${v.element.name}_';
       while (name == null || _usedNames.contains(name)) {
         name = "$prefix${_counter++}";
       }
       _names[v] = name;
       _usedNames.add(name);
     }
     return name;
   }
 }