1) Implemented regular button and html4 button with a button renderer.

2) Fixed ProgressMeter to update correctly when attributes change
3) Fixed sample8.html so that it does not over ride the borders of the HTML4 button this
   messed up the active, hover, and disabled states.

layout/forms/nsFileControlFrame.cpp

@@ -389,6 +389,12 @@ nsFileControlFrame::GetHorizontalInsidePadding(nsIPresContext& aPresContext,
   return 0;
 }
 
+nsresult nsFileControlFrame::RequiresWidget(PRBool& aRequiresWidget)
+{
+  aRequiresWidget = PR_FALSE;
+  return NS_OK;
+}
+
 
 NS_IMETHODIMP nsFileControlFrame::SetProperty(nsIAtom* aName, const nsString& aValue)
 {