Fixes for raw string and block clean ups

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

Index: compiler/java/com/google/dart/compiler/ast/DartNativeBlock.java
diff --git a/compiler/java/com/google/dart/compiler/ast/DartNativeBlock.java b/compiler/java/com/google/dart/compiler/ast/DartNativeBlock.java
index c992cd48822c2d50036f4835139e17d7e18328ad..100a956a0e5625bea3ae7df6ec443d57c04e6558 100644
--- a/compiler/java/com/google/dart/compiler/ast/DartNativeBlock.java
+++ b/compiler/java/com/google/dart/compiler/ast/DartNativeBlock.java
@@ -10,12 +10,20 @@ package com.google.dart.compiler.ast;
  */
 public class DartNativeBlock extends DartBlock {
 
-  public DartNativeBlock() {
+  private final DartExpression body;
+
+  public DartNativeBlock(DartExpression body) {
     super(null);
+    this.body = body;
+  }
+  
+  public DartExpression getBody() {
+    return body;
   }
 
   @Override
   public void visitChildren(ASTVisitor<?> visitor) {
+    safelyVisitChild(body, visitor);
   }
 
   @Override