Don't include trailing comments in javascript snippets.

Source/core/html/parser/XSSAuditor.cpp

 /*
  * Copyright (C) 2011 Adam Barth. All Rights Reserved.
  * Copyright (C) 2011 Daniel Bates (dbates@intudata.com).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 678 matching lines @@
     }
 
     String result;
     while (startPosition < endPosition && !result.length()) {
         // Stop at next comment (using the same rules as above for SVG/XML vs HTML), when we encounter a comma,
         // when we hit an opening <script> tag, or when we exceed the maximum length target. The comma rule
         // covers a common parameter concatenation case performed by some web servers.
         lastNonSpacePosition = kNotFound;
         for (foundPosition = startPosition; foundPosition < endPosition; foundPosition++) {
             if (!request.shouldAllowCDATA) {
-                if (startsSingleLineCommentAt(string, foundPosition) || startsMultiLineCommentAt(string, foundPosition)) {
-                    foundPosition += 2;
-                    break;
-                }
-                if (startsHTMLCommentAt(string, foundPosition)) {
-                    foundPosition += 4;
+                if (startsSingleLineCommentAt(string, foundPosition)
+                    || startsMultiLineCommentAt(string, foundPosition)
+                    || startsHTMLCommentAt(string, foundPosition)) {
                     break;
                 }
             }
             if (string[foundPosition] == ',')
                 break;
 
             if (lastNonSpacePosition != kNotFound && startsOpeningScriptTagAt(string, foundPosition)) {
                 foundPosition = lastNonSpacePosition;
                 break;
             }
@@ skipping 51 matching lines @@
 
 bool XSSAuditor::isSafeToSendToAnotherThread() const
 {
     return m_documentURL.isSafeToSendToAnotherThread()
         && m_decodedURL.isSafeToSendToAnotherThread()
         && m_decodedHTTPBody.isSafeToSendToAnotherThread()
         && m_httpBodyAsString.isSafeToSendToAnotherThread();
 }
 
 } // namespace WebCore