Work in progress of async loading of SCRIPT and STYLE with SRC attributes. Content sinks can now return a BLOCK_PARSER return code, forcing the parser to block. nsIParser::EnableParser can be used to unblock. Also introduced nsIContentSink::SetParser.

parser/htmlparser/robot/nsRobotSink.cpp

@@ -76,6 +76,7 @@ public:
   NS_IMETHOD DidBuildModel(PRInt32 aQualityLevel) { return NS_OK; }
   NS_IMETHOD WillInterrupt(void) { return NS_OK; }
   NS_IMETHOD WillResume(void) { return NS_OK; }
+  NS_IMETHOD SetParser(nsIParser* aParser) { return NS_OK; }
 
   // nsIRobotSink
   NS_IMETHOD Init(nsIURL* aDocumentURL);