cc: Directly use property trees to calculate clip rect

cc/trees/property_tree.cc

Index: cc/trees/property_tree.cc
diff --git a/cc/trees/property_tree.cc b/cc/trees/property_tree.cc
index 7eea35e1152329e819f1dcfafa0ca08607e98d1b..02621097880c5590a7d5bb7de3598cc796b65ee9 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -442,8 +442,10 @@ EffectNodeData::EffectNodeData()
       has_animated_opacity(false),
       effect_changed(false),
       num_copy_requests_in_subtree(0),
+      has_unclipped_descendants(false),
       transform_id(0),
-      clip_id(0) {}
+      clip_id(0),
+      target_id(0) {}
 
 EffectNodeData::EffectNodeData(const EffectNodeData& other) = default;