Fix icon on Windows XP taskbar

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index f35b155db25513a71dfb8c5e8835bf652f049fe0..88b76e00e49866810a7c9bd61b8e6b0850d55433 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -910,6 +910,13 @@ HICON HWNDMessageHandler::GetDefaultWindowIcon() const {
       ViewsDelegate::views_delegate->GetDefaultWindowIcon() : NULL;
 }
 
+HICON HWNDMessageHandler::GetSmallWindowIcon() const {
+  if (use_system_default_icon_)
+    return NULL;
+  return ViewsDelegate::views_delegate ?
+      ViewsDelegate::views_delegate->GetSmallWindowIcon() : NULL;
+}
+
 LRESULT HWNDMessageHandler::OnWndProc(UINT message,
                                       WPARAM w_param,
                                       LPARAM l_param) {