dart2js cps: Access to lazily initialized fields.

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

Index: pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart
diff --git a/pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart b/pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart
index 5b5f16864322b713cdc886a056a105510e47bf00..8d5c2fbe49f6e1f1d18074e5001c921254f5b5e7 100644
--- a/pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart
+++ b/pkg/compiler/lib/src/tree_ir/tree_ir_builder.dart
@@ -667,6 +667,13 @@ class Builder implements cps_ir.Visitor<Node> {
     return new GetStatic(node.element, node.sourceInformation);
   }
 
+  Statement visitGetLazyStatic(cps_ir.GetLazyStatic node) {
+    // In the tree IR, GetStatic handles lazy fields because tree
+    // expressions are allowed to have side effects.
+    GetStatic value = new GetStatic(node.element, node.sourceInformation);
+    return continueWithExpression(node.continuation, value);
+  }
+
   Statement visitSetStatic(cps_ir.SetStatic node) {
     SetStatic setStatic = new SetStatic(
         node.element,