dart2js cps: Introduce GetStatic/SetStatic.

pkg/compiler/lib/src/tree_ir/optimization/pull_into_initializers.dart

 // Copyright (c) 2015, 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.
 
 import 'optimization.dart' show Pass;
 import '../tree_ir_nodes.dart';
 
 /// Pulls assignment expressions to the top of the function body so they can be
 /// translated into declaration-site variable initializaters.
 ///
@@ skipping 257 matching lines @@
   }
 
   Expression visitSetField(SetField node) {
     node.object = visitExpression(node.object);
     if (seenImpure) return node;
     node.value = visitExpression(node.value);
     seenImpure = true;
     return node;
   }
 
+  Expression visitGetStatic(GetStatic node) {
+    seenImpure = true;
+    return node;
+  }
+
+  Expression visitSetStatic(SetStatic node) {
+    node.value = visitExpression(node.value);
+    seenImpure = true;
+    return node;
+  }
+
   Expression visitCreateBox(CreateBox node) {
     return node;
   }
 
   Expression visitCreateInstance(CreateInstance node) {
     rewriteList(node.arguments);
     return node;
   }
 
   Expression visitReifyRuntimeType(ReifyRuntimeType node) {
@@ skipping 25 matching lines @@
 
   Expression visitVariableUse(VariableUse node) {
     return node;
   }
 
   Expression visitCreateInvocationMirror(CreateInvocationMirror node) {
     rewriteList(node.arguments);
     return node;
   }
 }