Multi-select <select> in 'external popup window'

content/test/test_web_contents_view.cc

Index: content/test/test_web_contents_view.cc
diff --git a/content/test/test_web_contents_view.cc b/content/test/test_web_contents_view.cc
index 26411542ddf8dcc799d09e2487e08eda23cea8a9..d56f1e24ccafd017743c003aa6b23cfceedd2489 100644
--- a/content/test/test_web_contents_view.cc
+++ b/content/test/test_web_contents_view.cc
@@ -16,6 +16,15 @@ void TestWebContentsView::ShowContextMenu(
     const ContextMenuParams& params) {
 }
 
+void TestWebContentsView::ShowPopupMenu(const gfx::Rect& bounds,
+                                        int item_height,
+                                        double item_font_size,
+                                        int selected_item,
+                                        const std::vector<WebMenuItem>& items,
+                                        bool right_aligned,
+                                        bool allow_multiple_selection) {
+}
+
 void TestWebContentsView::StartDragging(
     const WebDropData& drop_data,
     WebKit::WebDragOperationsMask allowed_ops,