Auto merge of #23007 - BartGitHub:remove-pipeline-visibility-checks, r=jdm

Remove pipeline visibility checks

<!-- Please describe your changes on the following line: -->
This includes the following changes/clean-ups:

- Remove ```is_visible``` field from ```Pipeline``` struct
- Remove ```SetVisible``` script message, and related message sending/handling.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #22986

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- [x] These changes do not require tests because the issue description states having a passing build is enough for a pull request.

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3 files changed, 0 insertions, 48 deletions

diff --git a/components/constellation/constellation.rs b/components/constellation/constellation.rs
index 076204cd0c7..e4120579912 100644
--- a/components/constellation/constellation.rs
+++ b/components/constellation/constellation.rs
@@ -1322,9 +1322,6 @@ where
                     }
                 }
             },
-            FromScriptMsg::SetVisible(is_visible) => {
-                self.handle_set_visible_msg(source_pipeline_id, is_visible);
-            },
             FromScriptMsg::VisibilityChangeComplete(is_visible) => {
                 self.handle_visibility_change_complete(source_pipeline_id, is_visible);
             },
@@ -3036,38 +3033,6 @@ where
         result
     }
 
-    fn handle_set_visible_msg(&mut self, pipeline_id: PipelineId, is_visible: bool) {
-        let browsing_context_id = match self.pipelines.get(&pipeline_id) {
-            Some(pipeline) => pipeline.browsing_context_id,
-            None => {
-                return warn!(
-                    "No browsing context associated with pipeline {:?}",
-                    pipeline_id
-                );
-            },
-        };
-
-        // TODO(mandreyel): can we make a mutable version of
-        // AllBrowsingContextsIterator to directly modify a browsing context
-        // without the need for this indirection?
-        let nested_ctx_ids: Vec<BrowsingContextId> = self
-            .all_descendant_browsing_contexts_iter(browsing_context_id)
-            .filter(|ctx| ctx.is_visible != is_visible)
-            .map(|ctx| ctx.id)
-            .collect();
-
-        for ctx_id in nested_ctx_ids {
-            if let Some(browsing_context) = self.browsing_contexts.get_mut(&ctx_id) {
-                browsing_context.is_visible = is_visible;
-                for pipeline_id in browsing_context.pipelines.iter() {
-                    if let Some(pipeline) = self.pipelines.get_mut(&pipeline_id) {
-                        pipeline.notify_visibility(is_visible);
-                    }
-                }
-            }
-        }
-    }
-
     fn handle_visibility_change_complete(&mut self, pipeline_id: PipelineId, visibility: bool) {
         let browsing_context_id = match self.pipelines.get(&pipeline_id) {
             Some(pipeline) => pipeline.browsing_context_id,
diff --git a/components/script/dom/htmliframeelement.rs b/components/script/dom/htmliframeelement.rs
index 3a01d36beeb..822484a7991 100644
--- a/components/script/dom/htmliframeelement.rs
+++ b/components/script/dom/htmliframeelement.rs
@@ -397,16 +397,6 @@ impl HTMLIFrameElement {
         }
     }
 
-    pub fn set_visible(&self, visible: bool) {
-        let msg = ScriptMsg::SetVisible(visible);
-        let window = window_from_node(self);
-        window
-            .upcast::<GlobalScope>()
-            .script_to_constellation_chan()
-            .send(msg)
-            .unwrap();
-    }
-
     /// https://html.spec.whatwg.org/multipage/#iframe-load-event-steps steps 1-4
     pub fn iframe_load_event_steps(&self, loaded_pipeline: PipelineId) {
         // TODO(#9592): assert that the load blocker is present at all times when we
diff --git a/components/script_traits/script_msg.rs b/components/script_traits/script_msg.rs
index 2ad62849c68..33cc94d0128 100644
--- a/components/script_traits/script_msg.rs
+++ b/components/script_traits/script_msg.rs
@@ -175,8 +175,6 @@ pub enum ScriptMsg {
     /// Notification that this iframe should be removed.
     /// Returns a list of pipelines which were closed.
     RemoveIFrame(BrowsingContextId, IpcSender<Vec<PipelineId>>),
-    /// Change pipeline visibility
-    SetVisible(bool),
     /// Notifies constellation that an iframe's visibility has been changed.
     VisibilityChangeComplete(bool),
     /// A load has been requested in an IFrame.
@@ -243,7 +241,6 @@ impl fmt::Debug for ScriptMsg {
             ReplaceHistoryState(..) => "ReplaceHistoryState",
             JointSessionHistoryLength(..) => "JointSessionHistoryLength",
             RemoveIFrame(..) => "RemoveIFrame",
-            SetVisible(..) => "SetVisible",
             VisibilityChangeComplete(..) => "VisibilityChangeComplete",
             ScriptLoadedURLInIFrame(..) => "ScriptLoadedURLInIFrame",
             ScriptNewIFrame(..) => "ScriptNewIFrame",