diff --git a/src/components/main/compositing/compositor_layer.rs b/src/components/main/compositing/compositor_layer.rs
index fce05548531..b4e79cf6ac2 100644
--- a/src/components/main/compositing/compositor_layer.rs
+++ b/src/components/main/compositing/compositor_layer.rs
@@ -15,6 +15,7 @@ use windowing::{MouseWindowEvent, MouseWindowClickEvent, MouseWindowMouseDownEve
 use compositing::quadtree::{Quadtree, Invalid};
 use layers::layers::{ContainerLayerKind, ContainerLayer, TextureLayerKind, TextureLayer, TextureManager};
 use pipeline::Pipeline;
+use constellation::{SendableChildFrameTree, SendableFrameTree};
 
 /// The CompositorLayer represents an element on a page that has a unique scroll
 /// or animation behavior. This can include absolute positioned elements, iframes, etc.
@@ -81,6 +82,27 @@ impl CompositorLayer {
         }
     }
     
+    pub fn from_frame_tree(frame_tree: SendableFrameTree, tile_size: uint, max_mem: Option<uint>) -> CompositorLayer {
+        let SendableFrameTree { pipeline, children } = frame_tree;
+        CompositorLayer {
+            pipeline: pipeline,
+            page_size: None,
+            scroll_offset: Point2D(0f32, 0f32),
+            children: (do children.consume_iter().transform |child| {
+                let SendableChildFrameTree { frame_tree, rect } = child;
+                let container = @mut ContainerLayer();
+                container.scissor = rect;
+                CompositorLayerChild {
+                    child: ~CompositorLayer::from_frame_tree(frame_tree, tile_size, max_mem),
+                    container: container,
+                }
+            }).collect(),
+            quadtree: NoTree(tile_size, max_mem),
+            root_layer: @mut ContainerLayer(),
+            hidden: true,
+        }
+    }
+
     // Move the layer by as relative specified amount in page coordinates. Does not change
     // the position of the layer relative to its parent. This also takes in a cursor position
     // to see if the mouse is over child layers first. If a layer successfully scrolled, returns
diff --git a/src/components/main/constellation.rs b/src/components/main/constellation.rs
index 6efcf8c7ff3..8fb698f8132 100644
--- a/src/components/main/constellation.rs
+++ b/src/components/main/constellation.rs
@@ -22,7 +22,7 @@ use servo_net::image_cache_task::{ImageCacheTask, ImageCacheTaskClient};
 use servo_net::resource_task::ResourceTask;
 use servo_net::resource_task;
 use servo_util::time::ProfilerChan;
-use std::hashmap::{HashMap, HashSet};
+use std::hashmap::HashMap;
 use std::util::replace;
 use extra::future::from_value;
 
@@ -361,26 +361,6 @@ impl Constellation {
                 self.pipelines.insert(pipeline.id, pipeline);
             }
 
-/* 
-            FrameRectMsg(pipeline_id, subpage_id, rect) => {
-                let frame_trees: ~[@mut FrameTree] = {
-                    let matching_navi_frames = self.navigation_context.find_all(pipeline_id);
-                    let matching_pending_frames = do self.pending_frames.iter().filter_map |frame_change| {
-                        frame_change.after.find_mut(pipeline_id)
-                    };
-                    matching_navi_frames.consume_iter().chain_(matching_pending_frames).collect()
-                };
-                let mut subframes = HashSet::new();
-                for self.current_frame().find(pipeline_id).iter().advance |subframe| {
-                    self.compositor_chan.send(ResizeLayerMsg(
-                }
-                if self.current_frame().contains(pipeline_id) {
-                    self.compositor_chan.send(ResizeLayerMsg(pipeline_
-                }
-                let frame_trees = self.navigation_context.find_all(pipeline_id);
-            }
-
-*/
             LoadIframeUrlMsg(url, source_pipeline_id, subpage_id, size_future) => {
                 // A message from the script associated with pipeline_id that it has
                 // parsed an iframe during html parsing. This iframe will result in a
@@ -446,7 +426,7 @@ impl Constellation {
                 } else {
                     pipeline.load(url, None);
                 }
-                let rect = self.pending_sizes.pop((source_pipeline_id, subpage_id));
+                let rect = self.pending_sizes.pop(&(source_pipeline_id, subpage_id));
                 for frame_tree in frame_trees.iter() {
                     frame_tree.children.push(ChildFrameTree {
                         frame_tree: @mut FrameTree {