Added a new method, GetStyleHintForAttributeChange() to nsIHTMLContent and implemented it in all the HTML content classes. The method is used by the HTML style sheet to get a style change hint from the content object when an attribute of the content object changes.

git-svn-id: svn://10.0.0.236/trunk@16185 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/layout/html/content/src/nsHTMLFrameSetElement.cpp

@@ -186,3 +186,13 @@ nsHTMLFrameSetElement::HandleDOMEvent(nsIPresContext& aPresContext,
   return mInner.HandleDOMEvent(aPresContext, aEvent, aDOMEvent,
                                aFlags, aEventStatus);
 }
+
+NS_IMETHODIMP
+nsHTMLFrameSetElement::GetStyleHintForAttributeChange(
+    const nsIContent * aNode,
+    const nsIAtom* aAttribute,
+    PRInt32 *aHint) const
+{
+  nsGenericHTMLElement::SetStyleHintForCommonAttributes(aNode, aAttribute, aHint);
+  return NS_OK;
+}