Update SetPaintToLayer to accept LayerType

ash/common/system/tray/tray_item_view.cc

Index: ash/common/system/tray/tray_item_view.cc
diff --git a/ash/common/system/tray/tray_item_view.cc b/ash/common/system/tray/tray_item_view.cc
index a2cb5e7738484565a109fec87cd407555dbdcfd8..8e8ab62a0a01ade589e037b04b0fc6a383a09353 100644
--- a/ash/common/system/tray/tray_item_view.cc
+++ b/ash/common/system/tray/tray_item_view.cc
@@ -11,6 +11,7 @@
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/public/cpp/shelf_types.h"
 #include "ui/compositor/layer.h"
+#include "ui/compositor/layer_type.h"
 #include "ui/gfx/animation/slide_animation.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
@@ -30,7 +31,7 @@ namespace ash {
 
 TrayItemView::TrayItemView(SystemTrayItem* owner)
     : owner_(owner), label_(NULL), image_view_(NULL) {
-  SetPaintToLayer(true);
+  SetPaintToLayer(ui::LAYER_TEXTURED);
   layer()->SetFillsBoundsOpaquely(false);
   SetLayoutManager(new views::FillLayout());
 }