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

ash/shelf/shelf_view.cc

Index: ash/shelf/shelf_view.cc
diff --git a/ash/shelf/shelf_view.cc b/ash/shelf/shelf_view.cc
index 5e4f00255c028296401e34233c241e8af1e0803f..9e012423c2306311040bb1be5c9d32c2e6346060 100644
--- a/ash/shelf/shelf_view.cc
+++ b/ash/shelf/shelf_view.cc
@@ -1669,6 +1669,13 @@ void ShelfView::ButtonPressed(views::Button* sender, const ui::Event& event) {
   if (!IsUsableEvent(event))
     return;
 
+  // Don't activate the item twice on double-click. Otherwise the window starts
+  // animating open due to the first click, then immediately minimizes due to
+  // the second click. The user most likely intended to open or minimize the
+  // item once, not do both.
+  if (event.flags() & ui::EF_IS_DOUBLE_CLICK)
+    return;
+
   {
     ScopedTargetRootWindow scoped_target(
         sender->GetWidget()->GetNativeView()->GetRootWindow());