Fix license headers in a number of files

chrome/common/extensions/docs/examples/apps/hello-java/HelloLicenseServlet.java

 /*
+ * Copyright (c) 2012 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
  * The "Hello world!" of the Chrome Web Store Licensing API, in Java. This
  * program logs the user in with OpenID, fetches their license state with OAuth,
  * and prints one of these greetings as appropriate:
  *
  *   1. Hello *no* license!
  *   2. Hello *free trial* license!
  *   3. Hello *full* license!
  *
- * Copyright 2010 the Chromium Authors
- *
- * Use of this source code is governed by a BSD-style license that can be found
- * in the "LICENSE" file.
- *
  * Brian Kennish <bkennish@chromium.org>
  */
 package com.example;
 
 import java.io.*;
 import java.net.*;
 import java.util.HashSet;
 import javax.servlet.http.*;
 import com.google.appengine.api.users.*;
 import com.google.appengine.repackaged.org.json.JSONObject;
@@ skipping 84 matching lines @@
         userService.createLoginURL(
           url,
           null,
           "https://www.google.com/accounts/o8/id",
           new HashSet<String>()
         )
       );
     }
   }
 }