dart2js cps: Introduce GetStatic/SetStatic.

pkg/compiler/lib/src/tree_ir/tree_ir_builder.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_builder;
 
 import '../dart2jslib.dart' as dart2js;
 import '../dart_types.dart';
 import '../elements/elements.dart';
 import '../cps_ir/cps_ir_nodes.dart' as cps_ir;
@@ skipping 644 matching lines @@
   Expression visitReadTypeVariable(cps_ir.ReadTypeVariable node) {
     return new ReadTypeVariable(node.variable, getVariableUse(node.target));
   }
 
   @override
   Node visitTypeExpression(cps_ir.TypeExpression node) {
     return new TypeExpression(
         node.dartType,
         node.arguments.map(getVariableUse).toList());
   }
+
+  Expression visitGetStatic(cps_ir.GetStatic node) {
+    return new GetStatic(node.element, node.sourceInformation);
+  }
+
+  Statement visitSetStatic(cps_ir.SetStatic node) {
+    SetStatic setStatic = new SetStatic(
+        node.element,
+        getVariableUse(node.value),
+        node.sourceInformation);
+    return new ExpressionStatement(setStatic, visit(node.body));
+  }
 }