constellation: ensure non embedded iframes are not considered as top-level BC

patches/components/constellation/constellation.rs.patch

···
          let new_pipeline_info = NewPipelineInfo {
              parent_info: parent_pipeline_id,
              new_pipeline_id,
-@@ -1051,6 +1085,8 @@
+@@ -1051,6 +1085,13 @@
              viewport_details: initial_viewport_details,
              user_content_manager_id,
              theme,
-+            is_embedded_webview: self.embedded_webview_to_iframe.contains_key(&webview_id),
++            // Only set is_embedded_webview=true if this browsing context IS the embedded webview itself,
++            // not for regular iframes inside the embedded webview that happen to share the same webview_id
++            is_embedded_webview: self
++                .embedded_webview_to_iframe
++                .get(&webview_id)
++                .is_some_and(|(embedded_bc_id, _)| *embedded_bc_id == browsing_context_id),
 +            hide_focus,
          };
          let pipeline = match Pipeline::spawn(new_pipeline_info, event_loop, self, throttled) {
              Ok(pipeline) => pipeline,
-@@ -1522,11 +1558,7 @@
+@@ -1522,11 +1563,7 @@
                  }
              },
              EmbedderToConstellationMessage::PreferencesUpdated(updates) => {
···
                      let _ = event_loop.send(ScriptThreadMessage::PreferencesUpdated(
                          updates
                              .iter()
-@@ -1550,6 +1582,18 @@
+@@ -1550,6 +1587,18 @@
              EmbedderToConstellationMessage::UpdatePinchZoomInfos(pipeline_id, pinch_zoom) => {
                  self.handle_update_pinch_zoom_infos(pipeline_id, pinch_zoom);
              },
···
          }
      }
 
-@@ -1773,6 +1817,12 @@
+@@ -1773,6 +1822,12 @@
                  self.broadcast_channels
                      .remove_broadcast_channel_router(router_id);
              },
···
              ScriptToConstellationMessage::ScheduleBroadcast(router_id, message) => {
                  if self
                      .check_origin_against_pipeline(&source_pipeline_id, &message.origin)
-@@ -1803,6 +1853,12 @@
+@@ -1803,6 +1858,12 @@
              ScriptToConstellationMessage::CreateAuxiliaryWebView(load_info) => {
                  self.handle_script_new_auxiliary(load_info);
              },
···
              ScriptToConstellationMessage::ChangeRunningAnimationsState(animation_state) => {
                  self.handle_change_running_animations_state(source_pipeline_id, animation_state)
              },
-@@ -1969,6 +2025,23 @@
+@@ -1969,6 +2030,23 @@
                      new_value,
                  );
              },
···
              ScriptToConstellationMessage::MediaSessionEvent(pipeline_id, event) => {
                  // Unlikely at this point, but we may receive events coming from
                  // different media sessions, so we set the active media session based
-@@ -2037,6 +2110,129 @@
+@@ -2037,6 +2115,129 @@
              ScriptToConstellationMessage::RespondToScreenshotReadinessRequest(response) => {
                  self.handle_screenshot_readiness_response(source_pipeline_id, response);
              },
···
          }
      }
 
-@@ -3135,6 +3331,13 @@
+@@ -3135,6 +3336,13 @@
      /// <https://html.spec.whatwg.org/multipage/#destroy-a-top-level-traversable>
      fn handle_close_top_level_browsing_context(&mut self, webview_id: WebViewId) {
          debug!("{webview_id}: Closing");
···
          let browsing_context_id = BrowsingContextId::from(webview_id);
          // Step 5. Remove traversable from the user agent's top-level traversable set.
          let browsing_context =
-@@ -3411,8 +3614,27 @@
+@@ -3411,8 +3619,27 @@
              opener_webview_id,
              opener_pipeline_id,
              response_sender,
···
          let Some((webview_id_sender, webview_id_receiver)) = generic_channel::channel() else {
              warn!("Failed to create channel");
              let _ = response_sender.send(None);
-@@ -3510,6 +3732,359 @@
+@@ -3510,6 +3737,359 @@
          });
      }
 
···
      #[servo_tracing::instrument(skip_all)]
      fn handle_refresh_cursor(&self, pipeline_id: PipelineId) {
          let Some(pipeline) = self.pipelines.get(&pipeline_id) else {
-@@ -4632,7 +5207,7 @@
+@@ -4632,7 +5212,7 @@
      }
 
      #[servo_tracing::instrument(skip_all)]
···
          // Send a flat projection of the history to embedder.
          // The final vector is a concatenation of the URLs of the past
          // entries, the current entry and the future entries.
-@@ -4735,9 +5310,23 @@
+@@ -4735,9 +5315,23 @@
          );
          self.embedder_proxy.send(EmbedderMsg::HistoryChanged(
              webview_id,