Change Aura overlay scrollbars from solid color to painted scrollbars.

cc/trees/layer_tree_impl.cc

 // Copyright 2011 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 "cc/trees/layer_tree_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1341 matching lines @@
 gfx::Size LayerTreeImpl::DrawViewportSize() const {
   return layer_tree_host_impl_->DrawViewportSize();
 }
 
 const gfx::Rect LayerTreeImpl::ViewportRectForTilePriority() const {
   return layer_tree_host_impl_->ViewportRectForTilePriority();
 }
 
 std::unique_ptr<ScrollbarAnimationController>
 LayerTreeImpl::CreateScrollbarAnimationController(int scroll_layer_id) {
-  DCHECK(settings().scrollbar_fade_delay_ms);
-  DCHECK(settings().scrollbar_fade_duration_ms);
-  base::TimeDelta delay =
-      base::TimeDelta::FromMilliseconds(settings().scrollbar_fade_delay_ms);
-  base::TimeDelta resize_delay = base::TimeDelta::FromMilliseconds(
-      settings().scrollbar_fade_resize_delay_ms);
-  base::TimeDelta duration =
-      base::TimeDelta::FromMilliseconds(settings().scrollbar_fade_duration_ms);
+  DCHECK(!settings().scrollbar_fade_delay.is_zero());
+  DCHECK(!settings().scrollbar_fade_duration.is_zero());
+  base::TimeDelta delay = settings().scrollbar_fade_delay;
+  base::TimeDelta resize_delay = settings().scrollbar_fade_resize_delay;
+  base::TimeDelta duration = settings().scrollbar_fade_duration;
   switch (settings().scrollbar_animator) {
     case LayerTreeSettings::LINEAR_FADE: {
       return ScrollbarAnimationControllerLinearFade::Create(
           scroll_layer_id, layer_tree_host_impl_, delay, resize_delay,
           duration);
     }
     case LayerTreeSettings::THINNING: {
       return ScrollbarAnimationControllerThinning::Create(
           scroll_layer_id, layer_tree_host_impl_, delay, resize_delay,
           duration);
@@ skipping 697 matching lines @@
 
 void LayerTreeImpl::ResetAllChangeTracking() {
   layers_that_should_push_properties_.clear();
   // Iterate over all layers, including masks.
   for (auto& layer : *layers_)
     layer->ResetChangeTracking();
   property_trees_.ResetAllChangeTracking();
 }
 
 }  // namespace cc