Add ink drop ripple to shelf overflow button

ui/views/controls/button/custom_button.cc

Index: ui/views/controls/button/custom_button.cc
diff --git a/ui/views/controls/button/custom_button.cc b/ui/views/controls/button/custom_button.cc
index 85dc33627b1d853aebe03296affa86e9b96f3618..4e76eff3a3049aabdc99902052cd1cad0343dd56 100644
--- a/ui/views/controls/button/custom_button.cc
+++ b/ui/views/controls/button/custom_button.cc
@@ -184,6 +184,8 @@ bool CustomButton::OnMouseDragged(const ui::MouseEvent& event) {
 }
 
 void CustomButton::OnMouseReleased(const ui::MouseEvent& event) {
+  const bool was_pressed = state_ == STATE_PRESSED;
+
   if (state_ != STATE_DISABLED) {
     if (!HitTestPoint(event.location())) {
       SetState(STATE_NORMAL);
@@ -197,7 +199,7 @@ void CustomButton::OnMouseReleased(const ui::MouseEvent& event) {
       }
     }
   }
-  if (notify_action_ == NOTIFY_ON_RELEASE)
+  if (notify_action_ == NOTIFY_ON_RELEASE && was_pressed)
     OnClickCanceled(event);
 }