dart2js cps: Replace GetLazyStatic with GetStatic.

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

 library dart2js.cps_ir.finalize;
 
 import 'cps_ir_nodes.dart';
 import 'cps_fragment.dart';
 import 'optimizers.dart' show Pass;
 import '../js_backend/js_backend.dart' show JavaScriptBackend;
 import '../js_backend/backend_helpers.dart';
 
 /// A transformation pass that must run immediately before the tree IR builder.
 ///
@@ skipping 54 matching lines @@
       cps.ifTruthy(cps.applyBuiltin(BuiltinOperator.StrictEq,
           [node.length.definition, cps.makeZero()]))
           .invokeContinuation(fail);
     }
     cps.insideContinuation(fail).invokeStaticThrower(
           helpers.throwIndexOutOfRangeException,
           [node.object.definition, node.index.definition]);
     node..replaceUsesWith(node.object.definition)..destroy();
     return cps;
   }
+
+  void visitGetStatic(GetStatic node) {
+    if (node.witness != null) {
+      node..witness.unlink()..witness = null;
+    }
+  }
 }