Visit Node in CompileTimeConstantAnalyzer only if Node based

compiler/java/com/google/dart/compiler/resolver/DynamicElementImplementation.java

Index: compiler/java/com/google/dart/compiler/resolver/DynamicElementImplementation.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/DynamicElementImplementation.java b/compiler/java/com/google/dart/compiler/resolver/DynamicElementImplementation.java
index e803eb64d50c2e6ad85c2d018b479c8a0f0aaa25..f0d6aee0f30691a2bced183aaee67b0aa5d76883 100644
--- a/compiler/java/com/google/dart/compiler/resolver/DynamicElementImplementation.java
+++ b/compiler/java/com/google/dart/compiler/resolver/DynamicElementImplementation.java
@@ -18,7 +18,7 @@ import java.util.List;
 /**
  * Dummy element corresponding to {@link DynamicType}.
  */
-class DynamicElementImplementation extends AbstractElement implements DynamicElement {
+class DynamicElementImplementation extends AbstractNodeElement implements DynamicElement {
 
   private DynamicElementImplementation() {
     super(null, "<dynamic>");
@@ -271,4 +271,9 @@ class DynamicElementImplementation extends AbstractElement implements DynamicEle
   public void setType(Type type) {
     super.setType(type);
   }
+  
+  @Override
+  public Type getConstantType() {
+    return null;
+  }
 }