Added SetMaxTextLength method to text widget and textarea widget.

git-svn-id: svn://10.0.0.236/trunk@559 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/widget/tests/windows/winmain.cpp

@@ -994,6 +994,7 @@ int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmd
     textWidget->SetFont(font);
     nsString initialText("0123456789");
     textWidget->SetText(initialText);
+    textWidget->SetMaxTextLength(12);
 
     NS_RELEASE(textWidget); 
     y += rect.height + 5;