[ash-md] Updates ash shelf tooltips to MD

ui/views/bubble/bubble_border.cc

Index: ui/views/bubble/bubble_border.cc
diff --git a/ui/views/bubble/bubble_border.cc b/ui/views/bubble/bubble_border.cc
index f81bb2d761891c18a198ea49e466d87e0680fcfc..f2e8ff0f227d2b09636e957f743a55025da09e34 100644
--- a/ui/views/bubble/bubble_border.cc
+++ b/ui/views/bubble/bubble_border.cc
@@ -234,6 +234,12 @@ bool BubbleBorder::GetArrowPath(const gfx::Rect& view_bounds,
   return true;
 }
 
+void BubbleBorder::SetBorderInteriorThickness(int border_interior_thickness) {
+  images_->border_interior_thickness = border_interior_thickness;
+  if (!has_arrow(arrow_) || arrow_paint_type_ != PAINT_NORMAL)
+    images_->border_thickness = border_interior_thickness;
+}
+
 void BubbleBorder::Paint(const views::View& view, gfx::Canvas* canvas) {
   gfx::Rect bounds(view.GetContentsBounds());
   bounds.Inset(-GetBorderThickness(), -GetBorderThickness());