From efdc758dd7bb983f81737a927b1724bacecd5aea Mon Sep 17 00:00:00 2001
From: Martin Robinson <mrobinson@igalia.com>
Date: Mon, 17 Nov 2014 10:59:43 -0800
Subject: [PATCH] Only send SetLayerRect messages for compositor-backed frames

Only send SetLayerRect when we know that a frame has a compositor
layer. If it doesn't, we wait until we send the new layer to the
compositor.
---
 components/compositing/constellation.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/components/compositing/constellation.rs b/components/compositing/constellation.rs
index e1fa00c2e82..fca671550b1 100644
--- a/components/compositing/constellation.rs
+++ b/components/compositing/constellation.rs
@@ -626,9 +626,10 @@ impl<LTF: LayoutTaskFactory, STF: ScriptTaskFactory> Constellation<LTF, STF> {
                     match children.iter_mut().find(|child| subpage_eq(child)) {
                         None => {}
                         Some(child) => {
+                            let has_compositor_layer = child.frame_tree.has_compositor_layer.get();
                             update_child_rect(child,
                                               rect,
-                                              true,
+                                              has_compositor_layer,
                                               &mut already_sent,
                                               &mut self.compositor_proxy,
                                               self.window_size.device_pixel_ratio)