Validate the target of break and continue statments from within a switch

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

Index: compiler/java/com/google/dart/compiler/resolver/LabelElement.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/LabelElement.java b/compiler/java/com/google/dart/compiler/resolver/LabelElement.java
index 07a891c0801ea6e124898f0db4d13d4950e1c820..8fb58d91c00dcbfd197e7b2c7ae1fc15333ba996 100644
--- a/compiler/java/com/google/dart/compiler/resolver/LabelElement.java
+++ b/compiler/java/com/google/dart/compiler/resolver/LabelElement.java
@@ -5,8 +5,17 @@
 package com.google.dart.compiler.resolver;
 
 public interface LabelElement extends Element {
+  
+  public enum LabeledStatementType {
+    STATEMENT,
+    SWITCH_MEMBER_STATEMENT,
+    SWITCH_STATEMENT,
+  }
+  
   /**
    * Returns the innermost function where this label is defined.
    */
   public MethodElement getEnclosingFunction();
+  
+  public LabeledStatementType getStatementType();
 }