dart2js cps: Replace GetLazyStatic with GetStatic.

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 '../common.dart';
 import '../constants/values.dart';
 import '../cps_ir/cps_ir_nodes.dart' as cps_ir;
 import '../elements/elements.dart';
@@ skipping 626 matching lines @@
             node.codeTemplate,
             node.type,
             arguments,
             node.nativeBehavior,
             node.dependency);
       };
     }
   }
 
   Expression visitGetLazyStatic(cps_ir.GetLazyStatic node) {
-    // In the tree IR, GetStatic handles lazy fields because we do not need
-    // as fine-grained control over side effects.
-    return new GetStatic(node.element, node.sourceInformation);
+    return new GetStatic.lazy(node.element, node.sourceInformation);
   }
 
   @override
   NodeCallback visitYield(cps_ir.Yield node) {
     return (Statement next) {
       return new Yield(getVariableUse(node.input), node.hasStar, next);
     };
   }
 
   @override
@@ skipping 37 matching lines @@
     --enclosingFunctions;
   }
 
   @override
   visitInterpolatedNode(js.InterpolatedNode node) {
     if (enclosingFunctions > 0) {
       found = true;
     }
   }
 }