Allow overloading of GadgetHtmlParser (issue896042)

[zhoresh]

Reviewers: shindig.remailer_gmail.com, johnfargo,

Description:
Remove final from parseDom and parseFragment functions to allow creating
different parser.
For example a router between multiple parser.

Please review this at http://codereview.appspot.com/896042/show

Affected files:
   
java/gadgets/src/main/java/org/apache/shindig/gadgets/parse/GadgetHtmlParser.java


### Eclipse Workspace Patch 1.0
#P shindig-project
Index:  
java/gadgets/src/main/java/org/apache/shindig/gadgets/parse/GadgetHtmlParser.java
===================================================================
---  
java/gadgets/src/main/java/org/apache/shindig/gadgets/parse/GadgetHtmlParser.java	 
(revision 931314)
+++  
java/gadgets/src/main/java/org/apache/shindig/gadgets/parse/GadgetHtmlParser.java	 
(working copy)
@@ -89,7 +89,7 @@
     return normalized.contains("<!DOCTYPE") ||  
normalized.contains("<HTML");
   }

-  public final Document parseDom(String source) throws GadgetException {
+  public Document parseDom(String source) throws GadgetException {
     Document document = null;
     String key = null;
     // Avoid checksum overhead if we arent caching
@@ -233,7 +233,7 @@
    * @param result Node to append results to
    * @throws GadgetException
    */
-  public final void parseFragment(String source, Node result) throws  
GadgetException {
+  public void parseFragment(String source, Node result) throws  
GadgetException {
     boolean shouldCache = shouldCache();
     String key = null;
     if (shouldCache) {