Don't cast to NodeElement where not needed.

compiler/java/com/google/dart/compiler/ast/DartInvocation.java

Index: compiler/java/com/google/dart/compiler/ast/DartInvocation.java
diff --git a/compiler/java/com/google/dart/compiler/ast/DartInvocation.java b/compiler/java/com/google/dart/compiler/ast/DartInvocation.java
index 477c4c31e895ddc6f0a3d281d9abf72d6db2e713..1a3a0a2fd4cde16c3140b6a0b2797663ce7ca8c7 100644
--- a/compiler/java/com/google/dart/compiler/ast/DartInvocation.java
+++ b/compiler/java/com/google/dart/compiler/ast/DartInvocation.java
@@ -5,7 +5,6 @@
 package com.google.dart.compiler.ast;
 
 import com.google.dart.compiler.resolver.Element;
-import com.google.dart.compiler.resolver.NodeElement;
 
 import java.util.List;
 
@@ -36,7 +35,7 @@ import java.util.List;
 public abstract class DartInvocation extends DartExpression {
 
   private final NodeList<DartExpression> arguments = NodeList.create(this);
-  private NodeElement element;
+  private Element element;
 
   public DartInvocation(List<DartExpression> arguments) {
     if (arguments != null && !arguments.isEmpty()) {
@@ -53,12 +52,12 @@ public abstract class DartInvocation extends DartExpression {
   }
 
   @Override
-  public NodeElement getElement() {
+  public Element getElement() {
     return element;
   }
 
   @Override
   public void setElement(Element element) {
-    this.element = (NodeElement) element;
+    this.element = element;
   }
 }