cc: Remove support for disabling non-root render surfaces.

cc/trees/draw_property_utils.h

Index: cc/trees/draw_property_utils.h
diff --git a/cc/trees/draw_property_utils.h b/cc/trees/draw_property_utils.h
index 4f19d144f881585f049153519b3908d0a7a4c841..8af44da38d6f75c449054f90dad6cf23191c1711 100644
--- a/cc/trees/draw_property_utils.h
+++ b/cc/trees/draw_property_utils.h
@@ -34,8 +34,7 @@ void CC_EXPORT ConcatInverseSurfaceContentsScale(const EffectNode* effect_node,
                                                  gfx::Transform* transform);
 // Computes combined clips for every node in |clip_tree|. This function requires
 // that |transform_tree| has been updated via |ComputeTransforms|.
-void CC_EXPORT ComputeClips(PropertyTrees* property_trees,
-                            bool non_root_surfaces_enabled);
+void CC_EXPORT ComputeClips(PropertyTrees* property_trees);
 
 // Computes combined (screen space) transforms for every node in the transform
 // tree. This must be done prior to calling |ComputeClips|.
@@ -55,12 +54,10 @@ void CC_EXPORT BuildPropertyTreesAndComputeVisibleRects(
     float device_scale_factor,
     const gfx::Rect& viewport,
     const gfx::Transform& device_transform,
-    bool can_render_to_separate_surface,
     PropertyTrees* property_trees,
     LayerImplList* visible_layer_list);
 
-void CC_EXPORT UpdatePropertyTrees(PropertyTrees* property_trees,
-                                   bool can_render_to_separate_surface);
+void CC_EXPORT UpdatePropertyTrees(PropertyTrees* property_trees);
 
 void CC_EXPORT FindLayersThatNeedUpdates(LayerTreeHost* layer_tree_host,
                                          const PropertyTrees* property_trees,
@@ -68,7 +65,6 @@ void CC_EXPORT FindLayersThatNeedUpdates(LayerTreeHost* layer_tree_host,
 
 void CC_EXPORT ComputeVisibleRects(LayerImpl* root_layer,
                                    PropertyTrees* property_trees,
-                                   bool can_render_to_separate_surface,
                                    LayerImplList* visible_layer_list);
 
 gfx::Rect CC_EXPORT