Generalize scroll parent work in CalculateDrawProperties

cc/trees/layer_tree_host_common.h

 // 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.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_COMMON_H_
 #define CC_TREES_LAYER_TREE_HOST_COMMON_H_
 
 #include <limits>
 #include <vector>
 
@@ skipping 207 matching lines @@
           device_viewport_size,
           device_transform,
           1.f,
           1.f,
           NULL,
           std::numeric_limits<int>::max() / 2,
           false,
           true,
           false,
           render_surface_layer_list,
-          0) {
+          1) {
   DCHECK(root_layer);
   DCHECK(render_surface_layer_list);
 }
 
 template <typename LayerType, typename RenderSurfaceLayerListType>
 LayerTreeHostCommon::CalcDrawPropsInputsForTesting<LayerType,
                                                    RenderSurfaceLayerListType>::
     CalcDrawPropsInputsForTesting(
         LayerType* root_layer,
         const gfx::Size& device_viewport_size,
         RenderSurfaceLayerListType* render_surface_layer_list)
     : CalcDrawPropsInputs<LayerType, RenderSurfaceLayerListType>(
           root_layer,
           device_viewport_size,
           identity_transform_,
           1.f,
           1.f,
           NULL,
           std::numeric_limits<int>::max() / 2,
           false,
           true,
           false,
           render_surface_layer_list,
-          0) {
+          1) {
   DCHECK(root_layer);
   DCHECK(render_surface_layer_list);
 }
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_COMMON_H_