Pressing spacebar on toolbar buttons triggers the ripple effect.

ui/views/animation/test/test_ink_drop_delegate.h

Index: ui/views/animation/test/test_ink_drop_delegate.h
diff --git a/ui/views/animation/test/test_ink_drop_delegate.h b/ui/views/animation/test/test_ink_drop_delegate.h
index a3eee3e7cb4cb082137d3ad59b1988c0b0a112d8..fdcaad39aad1160d5e7809730609a66d213cdff3 100644
--- a/ui/views/animation/test/test_ink_drop_delegate.h
+++ b/ui/views/animation/test/test_ink_drop_delegate.h
@@ -16,14 +16,13 @@ class TestInkDropDelegate : public InkDropDelegate {
   TestInkDropDelegate();
   ~TestInkDropDelegate() override;
 
-  InkDropState state() const { return state_; }
-
   bool is_hovered() const { return is_hovered_; }
 
   // InkDropDelegate:
   void OnAction(InkDropState state) override;
   void SnapToActivated() override;
   void SetHovered(bool is_hovered) override;
+  InkDropState GetTargetInkDropState() const override;
 
  private:
   InkDropState state_;