Ash: Double-clicking on a shelf item now opens the item

ash/test/shelf_view_test_api.cc

Index: ash/test/shelf_view_test_api.cc
diff --git a/ash/test/shelf_view_test_api.cc b/ash/test/shelf_view_test_api.cc
index d190f954c9fd7c278598ad1b3b3f91be106cafc0..b55690f13b7f0a597a14540b7544a3cad31e474c 100644
--- a/ash/test/shelf_view_test_api.cc
+++ b/ash/test/shelf_view_test_api.cc
@@ -114,6 +114,11 @@ int ShelfViewTestAPI::GetButtonSpacing() {
   return kShelfButtonSpacing;
 }
 
+void ShelfViewTestAPI::ButtonPressed(views::Button* sender,
+                                     const ui::Event& event) {
+  return shelf_view_->ButtonPressed(sender, event);
+}
+
 bool ShelfViewTestAPI::SameDragType(ShelfItemType typea,
                                     ShelfItemType typeb) const {
   return shelf_view_->SameDragType(typea, typeb);