Added more complex profiling metadata.

components/script/layout_interface.rs

@@ -142,6 +142,8 @@ pub struct Reflow {
     pub goal: ReflowGoal,
     /// The URL of the page.
     pub url: Url,
+    /// Is the current reflow of an iframe, as opposed to a root window?
+    pub iframe: bool,
     /// The channel through which messages can be sent back to the script task.
     pub script_chan: ScriptControlChan,
     /// The current window size.

components/script/page.rs

@@ -347,6 +347,7 @@ impl Page {
                 let reflow = box Reflow {
                     document_root: root.to_trusted_node_address(),
                     url: self.get_url(),
+                    iframe: self.subpage_id.is_some(),
                     goal: goal,
                     window_size: window_size,
                     script_chan: script_chan,