cc: Derive draw opacity from property trees

cc/trees/draw_property_utils.cc

Index: cc/trees/draw_property_utils.cc
diff --git a/cc/trees/draw_property_utils.cc b/cc/trees/draw_property_utils.cc
index c9ead984cb713f6c5d5b0600881370d6fbad8d0c..1f8e1471e5c518035fd188e9c50c346974d7d3bc 100644
--- a/cc/trees/draw_property_utils.cc
+++ b/cc/trees/draw_property_utils.cc
@@ -262,10 +262,11 @@ void ComputeVisibleRectsUsingPropertyTrees(
     const gfx::Rect& viewport,
     const gfx::Transform& device_transform,
     TransformTree* transform_tree,
-    ClipTree* clip_tree) {
+    ClipTree* clip_tree,
+    OpacityTree* opacity_tree) {
   PropertyTreeBuilder::BuildPropertyTrees(
       root_layer, page_scale_layer, page_scale_factor, device_scale_factor,
-      viewport, device_transform, transform_tree, clip_tree);
+      viewport, device_transform, transform_tree, clip_tree, opacity_tree);
   ComputeTransforms(transform_tree);
   ComputeClips(clip_tree, *transform_tree);