Hide default context menu for platform apps.

chrome/browser/ui/views/tab_contents/tab_contents_view_views.cc

Index: chrome/browser/ui/views/tab_contents/tab_contents_view_views.cc
diff --git a/chrome/browser/ui/views/tab_contents/tab_contents_view_views.cc b/chrome/browser/ui/views/tab_contents/tab_contents_view_views.cc
index 2ae15357cc35a22eec83a36776f33e05d12c7003..36f50716560062b55574916f93fc1f774ad5e4de 100644
--- a/chrome/browser/ui/views/tab_contents/tab_contents_view_views.cc
+++ b/chrome/browser/ui/views/tab_contents/tab_contents_view_views.cc
@@ -341,6 +341,10 @@ void TabContentsViewViews::ShowContextMenu(const ContextMenuParams& params) {
   context_menu_.reset(new RenderViewContextMenuViews(tab_contents_, params));
   context_menu_->Init();
 
+  // Don't show empty menus.
+  if (context_menu_->menu_model().GetItemCount() == 0)
+    return;
+
   gfx::Point screen_point(params.x, params.y);
   views::View::ConvertPointToScreen(GetRootView(), &screen_point);