Update from https://crrev.com/312398

cc/layers/painted_scrollbar_layer_impl.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 "cc/layers/painted_scrollbar_layer_impl.h"
 
 #include <algorithm>
 
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/layers/layer.h"
@@ skipping 17 matching lines @@
 PaintedScrollbarLayerImpl::PaintedScrollbarLayerImpl(
     LayerTreeImpl* tree_impl,
     int id,
     ScrollbarOrientation orientation)
     : ScrollbarLayerImplBase(tree_impl, id, orientation, false, false),
       track_ui_resource_id_(0),
       thumb_ui_resource_id_(0),
       thumb_thickness_(0),
       thumb_length_(0),
       track_start_(0),
-      track_length_(0),
-      vertical_adjust_(0.f),
-      scroll_layer_id_(Layer::INVALID_ID) {}
+      track_length_(0) {
+}
 
 PaintedScrollbarLayerImpl::~PaintedScrollbarLayerImpl() {}
 
 scoped_ptr<LayerImpl> PaintedScrollbarLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
   return PaintedScrollbarLayerImpl::Create(tree_impl, id(), orientation());
 }
 
 void PaintedScrollbarLayerImpl::PushPropertiesTo(LayerImpl* layer) {
   ScrollbarLayerImplBase::PushPropertiesTo(layer);
@@ skipping 132 matching lines @@
 
 bool PaintedScrollbarLayerImpl::IsThumbResizable() const {
   return false;
 }
 
 const char* PaintedScrollbarLayerImpl::LayerTypeAsString() const {
   return "cc::PaintedScrollbarLayerImpl";
 }
 
 }  // namespace cc