cc : Fix transform calculation bug while calculating clip rects

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 ee90aa87fafa6de4f7c2da7e4203cbb601da1f0c..6bb8e50f8a13e8cc5e23cc51a0d5c5b554548c0a 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -2087,20 +2087,4 @@ gfx::Transform PropertyTrees::ToScreenSpaceTransformWithoutSurfaceContentsScale(
   return screen_space_transform;
 }
 
-bool PropertyTrees::ComputeTransformFromTarget(
-    int transform_id,
-    int effect_id,
-    gfx::Transform* transform) const {
-  transform->MakeIdentity();
-  if (transform_id == TransformTree::kInvalidNodeId)
-    return true;
-
-  const EffectNode* effect_node = effect_tree.Node(effect_id);
-
-  bool success = GetFromTarget(transform_id, effect_id, transform);
-  transform->Scale(effect_node->surface_contents_scale.x(),
-                   effect_node->surface_contents_scale.y());
-  return success;
-}
-
 }  // namespace cc