Update SetPaintToLayer to accept LayerType

ui/views/controls/scrollbar/overlay_scroll_bar.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/controls/scrollbar/overlay_scroll_bar.h"
 
 #include "base/macros.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/gfx/canvas.h"
@@ skipping 16 matching lines @@
 
 OverlayScrollBar::Thumb::Thumb(OverlayScrollBar* scroll_bar)
     : BaseScrollBarThumb(scroll_bar), scroll_bar_(scroll_bar) {
   // |scroll_bar| isn't done being constructed; it's not safe to do anything
   // that might reference it yet.
 }
 
 OverlayScrollBar::Thumb::~Thumb() {}
 
 void OverlayScrollBar::Thumb::Init() {
-  SetPaintToLayer(true);
+  SetPaintToLayer();
   layer()->SetFillsBoundsOpaquely(false);
   // Animate all changes to the layer except the first one.
   OnStateChanged();
   layer()->SetAnimator(ui::LayerAnimator::CreateImplicitAnimator());
 }
 
 gfx::Size OverlayScrollBar::Thumb::GetPreferredSize() const {
   // The visual size of the thumb is kThumbThickness, but it slides back and
   // forth by kThumbHoverOffset. To make event targetting work well, expand the
   // width of the thumb such that it's always taking up the full width of the
@@ skipping 58 matching lines @@
     layer()->SetOpacity(kThumbHoverAlpha);
   }
 }
 
 OverlayScrollBar::OverlayScrollBar(bool horizontal)
     : BaseScrollBar(horizontal), hide_timer_(false, false) {
   auto thumb = new Thumb(this);
   SetThumb(thumb);
   thumb->Init();
   set_notify_enter_exit_on_child(true);
-  SetPaintToLayer(true);
+  SetPaintToLayer();
   layer()->SetMasksToBounds(true);
   layer()->SetFillsBoundsOpaquely(false);
 }
 
 OverlayScrollBar::~OverlayScrollBar() {}
 
 gfx::Rect OverlayScrollBar::GetTrackBounds() const {
   gfx::Rect local = GetLocalBounds();
   // The track has to be wide enough for the thumb.
   local.Inset(gfx::Insets(IsHorizontal() ? -kThumbHoverOffset : 0,
@@ skipping 43 matching lines @@
 
 void OverlayScrollBar::StartHideCountdown() {
   if (IsMouseHovered())
     return;
   hide_timer_.Start(
       FROM_HERE, base::TimeDelta::FromSeconds(1),
       base::Bind(&OverlayScrollBar::Hide, base::Unretained(this)));
 }
 
 }  // namespace views