Handle static invocation

pkg/compiler/lib/src/kernel/element_map_impl.dart

Index: pkg/compiler/lib/src/kernel/element_map_impl.dart
diff --git a/pkg/compiler/lib/src/kernel/element_map_impl.dart b/pkg/compiler/lib/src/kernel/element_map_impl.dart
index 2c112b31c2082f1be4f6d2c70619d54a48cd5300..3eae1c184e12c3a9943b03560b3eaa99c4378ae1 100644
--- a/pkg/compiler/lib/src/kernel/element_map_impl.dart
+++ b/pkg/compiler/lib/src/kernel/element_map_impl.dart
@@ -715,6 +715,11 @@ class KernelToElementMapImpl extends KernelToElementMapMixin {
   ir.Member getMemberNode(KMember member) {
     return _memberList[member.memberIndex].node;
   }
+
+  /// Returns the kernel IR node that defines the [cls].
+  ir.Class getClassNode(KClass cls) {
+    return _classEnvs[cls.classIndex].cls;
+  }
 }
 
 /// Environment for fast lookup of program libraries.