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

ash/test/shelf_view_test_api.h

Index: ash/test/shelf_view_test_api.h
diff --git a/ash/test/shelf_view_test_api.h b/ash/test/shelf_view_test_api.h
index 71853fdeebd1a3e453d25d5aa0d4430d8924dedd..7916ea766eea04b9731fa2ac592f4b998a6138e9 100644
--- a/ash/test/shelf_view_test_api.h
+++ b/ash/test/shelf_view_test_api.h
@@ -13,6 +13,14 @@ class Rect;
 class Size;
 }
 
+namespace ui {
+class Event;
+}
+
+namespace views {
+class Button;
+}
+
 namespace ash {
 class OverflowBubble;
 class ShelfButton;
@@ -70,6 +78,9 @@ class ShelfViewTestAPI {
   // Returns the button space size.
   int GetButtonSpacing();
 
+  // Wrapper for ShelfView::ButtonPressed.
+  void ButtonPressed(views::Button* sender, const ui::Event& event);
+
   // Wrapper for ShelfView::SameDragType.
   bool SameDragType(ShelfItemType typea, ShelfItemType typeb) const;