Note scrollbar layer properties changed when position changes.

cc/layers/layer_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/layers/layer_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "base/strings/stringprintf.h"
 #include "cc/animation/animation_registrar.h"
 #include "cc/animation/scrollbar_animation_controller.h"
@@ skipping 815 matching lines @@
 
 void LayerImpl::UpdateScrollbarPositions() {
   gfx::Vector2dF current_offset = scroll_offset_ + ScrollDelta();
 
   gfx::RectF viewport(PointAtOffsetFromOrigin(current_offset), bounds_);
   gfx::SizeF scrollable_size(max_scroll_offset_.x() + bounds_.width(),
                              max_scroll_offset_.y() + bounds_.height());
   if (horizontal_scrollbar_layer_) {
     horizontal_scrollbar_layer_->SetCurrentPos(current_offset.x());
     horizontal_scrollbar_layer_->SetMaximum(max_scroll_offset_.x());
-    horizontal_scrollbar_layer_->set_visible_to_total_length_ratio(
+    horizontal_scrollbar_layer_->SetVisibleToTotalLengthRatio(
         viewport.width() / scrollable_size.width());
   }
   if (vertical_scrollbar_layer_) {
     vertical_scrollbar_layer_->SetCurrentPos(current_offset.y());
     vertical_scrollbar_layer_->SetMaximum(max_scroll_offset_.y());
-    vertical_scrollbar_layer_->set_visible_to_total_length_ratio(
+    vertical_scrollbar_layer_->SetVisibleToTotalLengthRatio(
         viewport.height() / scrollable_size.height());
   }
 
   if (current_offset == last_scroll_offset_)
     return;
   last_scroll_offset_ = current_offset;
 
   if (scrollbar_animation_controller_ &&
       !scrollbar_animation_controller_->IsScrollGestureInProgress()) {
     scrollbar_animation_controller_->DidProgrammaticallyUpdateScroll(
@@ skipping 288 matching lines @@
 
 size_t LayerImpl::GPUMemoryUsageInBytes() const { return 0; }
 
 scoped_ptr<base::Value> LayerImpl::AsValue() const {
   scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue());
   AsValueInto(state.get());
   return state.PassAs<base::Value>();
 }
 
 }  // namespace cc