8011676: Instances of Tokens.Comment should not be defined in inner classes

Reviewed-by: mcimadamore

src/share/classes/com/sun/tools/javac/parser/JavaTokenizer.java

 /*
- * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -770,7 +770,7 @@ public class JavaTokenizer {
     * (which is treated as the beginning of the first line).
     * Stops positioned at the closing '/'.
     */
-    protected class BasicComment<U extends UnicodeReader> implements Comment {
+    protected static class BasicComment<U extends UnicodeReader> implements Comment {
 
         CommentStyle cs;
         U comment_reader;

src/share/classes/com/sun/tools/javac/parser/JavadocTokenizer.java

@@ -206,7 +206,7 @@ public class JavadocTokenizer extends JavaTokenizer {
          }
      }
 
-     protected class JavadocComment extends JavaTokenizer.BasicComment<DocReader> {
+     protected static class JavadocComment extends JavaTokenizer.BasicComment<DocReader> {
 
         /**
         * Translated and stripped contents of doc comment