Bug 127270 ASSERTION: QueryInterface needed: 'query_result.get() == mRawPtr'

The problem was that InputTestConsumer's QI only listed nsIStreamListener even though
nsIStreamListener inherited from interface nsIRequestObserver.
This adds nsIRequestObserver to the QI.

patch by badami@netscape.com rs=darin a=asa

netwerk/test/TestProtocols.cpp

@@ -206,7 +206,7 @@ InputTestConsumer::~InputTestConsumer()
 {
 }
 
-NS_IMPL_ISUPPORTS1(InputTestConsumer, nsIStreamListener)
+NS_IMPL_ISUPPORTS2(InputTestConsumer, nsIStreamListener, nsIRequestObserver)
 
 NS_IMETHODIMP
 InputTestConsumer::OnStartRequest(nsIRequest *request, nsISupports* context)