Hides ink ripple when a button drag is started

ui/views/view.cc

Index: ui/views/view.cc
diff --git a/ui/views/view.cc b/ui/views/view.cc
index 4aa6d5a9fe2c0629d1c449f3908a1f6dbc402ea1..6359b1aa0c845176651563719af142c07918e7fd 100644
--- a/ui/views/view.cc
+++ b/ui/views/view.cc
@@ -1285,6 +1285,9 @@ int View::OnPerformDrop(const ui::DropTargetEvent& event) {
   return ui::DragDropTypes::DRAG_NONE;
 }
 
+void View::OnDragStarted(const ui::LocatedEvent& event) {
+}
+
 void View::OnDragDone() {
 }
 
@@ -2380,6 +2383,8 @@ bool View::DoDrag(const ui::LocatedEvent& event,
   if (widget->dragged_view())
     return false;
 
+  OnDragStarted(event);
+
   OSExchangeData data;
   WriteDragData(press_pt, &data);