Addresses a ClassCastException seen in the editor from MemberBuilder

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

Index: compiler/java/com/google/dart/compiler/resolver/ResolverErrorCode.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/ResolverErrorCode.java b/compiler/java/com/google/dart/compiler/resolver/ResolverErrorCode.java
index 1a6b82cca5ea8b00a09bac5e50c1199f7dff118b..c6ce59d73924e883776fd9adab93d61d1c6123d7 100644
--- a/compiler/java/com/google/dart/compiler/resolver/ResolverErrorCode.java
+++ b/compiler/java/com/google/dart/compiler/resolver/ResolverErrorCode.java
@@ -98,6 +98,7 @@ public enum ResolverErrorCode implements ErrorCode {
   STATIC_METHOD_ACCESS_SUPER("Cannot use 'super' in a static method"),
   STATIC_METHOD_ACCESS_THIS("Cannot use 'this' in a static method"),
   SUPER_OUTSIDE_OF_METHOD("Cannot use 'super' outside of a method"),
+  TOO_MANY_QUALIFIERS_FOR_METHOD("Too many qualifiers for method or constructor"),
   TOP_LEVEL_METHOD_ACCESS_SUPER("Cannot use 'super' in a top-level method"),
   TOP_LEVEL_METHOD_ACCESS_THIS("Cannot use 'this' in a top-level method"),
   TYPE_NOT_ASSIGNMENT_COMPATIBLE("%s is not assignable to %s"),
@@ -121,14 +122,17 @@ public enum ResolverErrorCode implements ErrorCode {
     this.message = message;
   }
 
+  @Override
   public String getMessage() {
     return message;
   }
 
+  @Override
   public ErrorSeverity getErrorSeverity() {
     return severity;
   }
 
+  @Override
   public SubSystem getSubSystem() {
     return SubSystem.RESOLVER;
   }