Turn off the tip for the sytem tray menu and the app list (ChromeOS).

ui/views/bubble/bubble_delegate.cc

Index: ui/views/bubble/bubble_delegate.cc
diff --git a/ui/views/bubble/bubble_delegate.cc b/ui/views/bubble/bubble_delegate.cc
index a713e43be8df947344c16b3dfe0fa02601945ef9..e42329c3250efd5d8cd0d8b320da3f569049043c 100644
--- a/ui/views/bubble/bubble_delegate.cc
+++ b/ui/views/bubble/bubble_delegate.cc
@@ -277,6 +277,12 @@ void BubbleDelegateView::SetAlignment(BubbleBorder::BubbleAlignment alignment) {
   SizeToContents();
 }
 
+void BubbleDelegateView::SetArrowPaintType(
+    BubbleBorder::ArrowPaintType paint_type) {
+  GetBubbleFrameView()->bubble_border()->set_paint_arrow(paint_type);
+  SizeToContents();
+}
+
 bool BubbleDelegateView::AcceleratorPressed(
     const ui::Accelerator& accelerator) {
   if (!close_on_esc() || accelerator.key_code() != ui::VKEY_ESCAPE)