dart2js cps: Introduce GetStatic/SetStatic.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart

 // Copyright (c) 2013, 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 dart2js.ir_builder_task;
 
 import '../closure.dart' as closurelib;
 import '../closure.dart' hide ClosureScope;
 import '../constants/expressions.dart';
 import '../dart_types.dart';
@@ skipping 3612 matching lines @@
   }
 
   processDeclareFunction(ir.DeclareFunction node) {
     node.body = replacementFor(node.body);
   }
 
   processSetField(ir.SetField node) {
     node.body = replacementFor(node.body);
   }
 
+  processSetStatic(ir.SetStatic node) {
+    node.body = replacementFor(node.body);
+  }
+
   processContinuation(ir.Continuation node) {
     node.body = replacementFor(node.body);
   }
 
   processBody(ir.Body node) {
     node.body = replacementFor(node.body);
   }
 }
 
 /// Visit a just-deleted subterm and unlink all [Reference]s in it.
 class RemovalVisitor extends ir.RecursiveVisitor {
   processReference(ir.Reference reference) {
     reference.unlink();
   }
 }