Update SetPaintToLayer to accept LayerType

ash/common/shelf/shelf_button.cc

Index: ash/common/shelf/shelf_button.cc
diff --git a/ash/common/shelf/shelf_button.cc b/ash/common/shelf/shelf_button.cc
index e7b4c0584e8b8faaae303ea1f38733550ed1a4c6..e880719c5fa7bae81793b3093d0256204ca51f73 100644
--- a/ash/common/shelf/shelf_button.cc
+++ b/ash/common/shelf/shelf_button.cc
@@ -21,6 +21,7 @@
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/layer.h"
+#include "ui/compositor/layer_type.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/events/event_constants.h"
 #include "ui/gfx/animation/animation_delegate.h"
@@ -273,7 +274,7 @@ ShelfButton::ShelfButton(InkDropButtonListener* listener, ShelfView* shelf_view)
   icon_shadows_.assign(kShadows, kShadows + arraysize(kShadows));
 
   // TODO: refactor the layers so each button doesn't require 2.
-  icon_view_->SetPaintToLayer(true);
+  icon_view_->SetPaintToLayer(ui::LAYER_TEXTURED);
   icon_view_->layer()->SetFillsBoundsOpaquely(false);
   icon_view_->SetHorizontalAlignment(views::ImageView::CENTER);
   icon_view_->SetVerticalAlignment(views::ImageView::LEADING);