cc: Calculate visible rect inside non root copy request

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 1bf2af33f0b238e34fd5bca6609f536d13aed9e7..e01fc6d986ea4a0776f4fa8551b8d3bdd94df2d0 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -1625,6 +1625,22 @@ void EffectTree::ClearCopyRequests() {
   set_needs_update(true);
 }
 
+int EffectTree::ClosestAncestorWithCopyRequest(int id) const {
+  DCHECK_GE(id, 0);
+  const EffectNode* node = Node(id);
+  while (node->id > 1) {
+    if (node->data.has_copy_request)
+      return node->id;
+
+    node = parent(node);
+  }
+
+  if (node->data.has_copy_request)
+    return 0;

[ajuma, 2016/06/14 15:09:53]

Could node->id be 1 here, and if so, should this return node->id instead of 0?

[weiliangc, 2016/06/15 12:27:57]

Done.

+  else
+    return -1;
+}
+
 void EffectTree::AddMaskOrReplicaLayerId(int id) {
   mask_replica_layer_ids_.push_back(id);
 }