Pressing spacebar on toolbar buttons triggers the ripple effect.

ui/views/animation/test/test_ink_drop_delegate.cc

Index: ui/views/animation/test/test_ink_drop_delegate.cc
diff --git a/ui/views/animation/test/test_ink_drop_delegate.cc b/ui/views/animation/test/test_ink_drop_delegate.cc
index a251d78af3b1f5f57e395992cb4bcce0cdc6bb7f..4fa9743b2dc0a1efd52240ad06d869dcfbd324f0 100644
--- a/ui/views/animation/test/test_ink_drop_delegate.cc
+++ b/ui/views/animation/test/test_ink_drop_delegate.cc
@@ -24,5 +24,9 @@ void TestInkDropDelegate::SetHovered(bool is_hovered) {
   is_hovered_ = is_hovered;
 }
 
+InkDropState TestInkDropDelegate::GetTargetInkDropState() const {
+  return state_;
+}
+
 }  // namespace test
 }  // namespace views