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

content/test/test_web_contents_view.h

Index: content/test/test_web_contents_view.h
diff --git a/content/test/test_web_contents_view.h b/content/test/test_web_contents_view.h
index ad72fe2bb9bca331314706ae7f5baec14fef8265..01b2a954798b1f4ccd843a076932d194becc9904 100644
--- a/content/test/test_web_contents_view.h
+++ b/content/test/test_web_contents_view.h
@@ -20,6 +20,13 @@ class TestWebContentsView : public WebContentsView,
 
   // RenderViewHostDelegateView:
   virtual void ShowContextMenu(const ContextMenuParams& params) OVERRIDE;
+  virtual void 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) OVERRIDE;
   virtual void StartDragging(const WebDropData& drop_data,
                              WebKit::WebDragOperationsMask allowed_ops,
                              const SkBitmap& image,