Table cells need to call DidSetStyleContext whenever their style changes, or

whenever the table's style changes.
This is a partial fix for bug 3513

layout/html/table/src/nsTableCellFrame.cpp

@@ -594,6 +594,7 @@ NS_METHOD nsTableCellFrame::IR_StyleChanged(nsIPresContext&          aPresContex
   nsresult rv = NS_OK;
   // we presume that all the easy optimizations were done in the nsHTMLStyleSheet before we were called here
   // XXX: we can optimize this when we know which style attribute changed
+  DidSetStyleContext(&aPresContext);
   nsTableFrame* tableFrame=nsnull;
   rv = nsTableFrame::GetTableFrame(this, tableFrame);
   if ((NS_SUCCEEDED(rv)) && (nsnull!=tableFrame))

layout/tables/nsTableCellFrame.cpp

@@ -594,6 +594,7 @@ NS_METHOD nsTableCellFrame::IR_StyleChanged(nsIPresContext&          aPresContex
   nsresult rv = NS_OK;
   // we presume that all the easy optimizations were done in the nsHTMLStyleSheet before we were called here
   // XXX: we can optimize this when we know which style attribute changed
+  DidSetStyleContext(&aPresContext);
   nsTableFrame* tableFrame=nsnull;
   rv = nsTableFrame::GetTableFrame(this, tableFrame);
   if ((NS_SUCCEEDED(rv)) && (nsnull!=tableFrame))