Don't build testbinding-related code by default (#37034)

Disabling the TestBinding-related bindings and implementations saves 2mb
in a release build. Also, we lost the related test preferences when we
turned the layout-2020 tests on, so the tests have all been failing for
a long time.

Testing: Existing tests in CI.

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

components/script/Cargo.toml

@@ -18,6 +18,7 @@ crown = ['js/crown']
 debugmozjs = ['js/debugmozjs']
 jitspew = ['js/jitspew']
 profilemozjs = ['js/profilemozjs']
+testbinding = ["script_bindings/testbinding"]
 tracing = ["dep:tracing", "script_bindings/tracing"]
 webgl_backtrace = ["canvas_traits/webgl_backtrace"]
 js_backtrace = []

components/script/dom/mod.rs

@@ -549,17 +549,29 @@ pub(crate) mod svgelement;
 pub(crate) mod svggraphicselement;
 pub(crate) mod svgimageelement;
 pub(crate) mod svgsvgelement;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testbinding;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testbindingiterable;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testbindingmaplikewithinterface;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testbindingmaplikewithprimitive;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testbindingpairiterable;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testbindingproxy;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testbindingsetlikewithinterface;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testbindingsetlikewithprimitive;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testns;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testutils;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testworklet;
+#[cfg(feature = "testbinding")]
 pub(crate) mod testworkletglobalscope;
 pub(crate) mod text;
 pub(crate) mod textcontrol;

components/script/dom/worklet.rs

@@ -43,6 +43,7 @@ use crate::dom::bindings::str::USVString;
 use crate::dom::bindings::trace::{CustomTraceable, JSTraceable, RootedTraceableBox};
 use crate::dom::globalscope::GlobalScope;
 use crate::dom::promise::Promise;
+#[cfg(feature = "testbinding")]
 use crate::dom::testworkletglobalscope::TestWorkletTask;
 use crate::dom::window::Window;
 use crate::dom::workletglobalscope::{
@@ -354,6 +355,7 @@ impl WorkletThreadPool {
     }
 
     /// For testing.
+    #[cfg(feature = "testbinding")]
     pub(crate) fn test_worklet_lookup(&self, id: WorkletId, key: String) -> Option<String> {
         let (sender, receiver) = unbounded();
         let msg = WorkletData::Task(id, WorkletTask::Test(TestWorkletTask::Lookup(key, sender)));

components/script/dom/workletglobalscope.rs

@@ -26,6 +26,7 @@ use crate::dom::bindings::trace::CustomTraceable;
 use crate::dom::bindings::utils::define_all_exposed_interfaces;
 use crate::dom::globalscope::GlobalScope;
 use crate::dom::paintworkletglobalscope::{PaintWorkletGlobalScope, PaintWorkletTask};
+#[cfg(feature = "testbinding")]
 use crate::dom::testworkletglobalscope::{TestWorkletGlobalScope, TestWorkletTask};
 #[cfg(feature = "webgpu")]
 use crate::dom::webgpu::identityhub::IdentityHub;
@@ -60,6 +61,7 @@ impl WorkletGlobalScope {
         init: &WorkletGlobalScopeInit,
     ) -> DomRoot<WorkletGlobalScope> {
         let scope: DomRoot<WorkletGlobalScope> = match scope_type {
+            #[cfg(feature = "testbinding")]
             WorkletGlobalScopeType::Test => DomRoot::upcast(TestWorkletGlobalScope::new(
                 runtime,
                 pipeline_id,
@@ -163,6 +165,7 @@ impl WorkletGlobalScope {
     /// Perform a worklet task
     pub(crate) fn perform_a_worklet_task(&self, task: WorkletTask) {
         match task {
+            #[cfg(feature = "testbinding")]
             WorkletTask::Test(task) => match self.downcast::<TestWorkletGlobalScope>() {
                 Some(global) => global.perform_a_worklet_task(task),
                 None => warn!("This is not a test worklet."),
@@ -203,6 +206,7 @@ pub(crate) struct WorkletGlobalScopeInit {
 #[derive(Clone, Copy, Debug, JSTraceable, MallocSizeOf)]
 pub(crate) enum WorkletGlobalScopeType {
     /// A servo-specific testing worklet
+    #[cfg(feature = "testbinding")]
     Test,
     /// A paint worklet
     Paint,
@@ -210,6 +214,7 @@ pub(crate) enum WorkletGlobalScopeType {
 
 /// A task which can be performed in the context of a worklet global.
 pub(crate) enum WorkletTask {
+    #[cfg(feature = "testbinding")]
     Test(TestWorkletTask),
     Paint(PaintWorkletTask),
 }

components/script/timers.rs

@@ -27,6 +27,7 @@ use crate::dom::bindings::str::DOMString;
 use crate::dom::document::{FakeRequestAnimationFrameCallback, RefreshRedirectDue};
 use crate::dom::eventsource::EventSourceTimeoutCallback;
 use crate::dom::globalscope::GlobalScope;
+#[cfg(feature = "testbinding")]
 use crate::dom::testbinding::TestBindingCallback;
 use crate::dom::types::{Window, WorkerGlobalScope};
 use crate::dom::xmlhttprequest::XHRTimeoutCallback;
@@ -78,6 +79,7 @@ pub(crate) enum OneshotTimerCallback {
     XhrTimeout(XHRTimeoutCallback),
     EventSourceTimeout(EventSourceTimeoutCallback),
     JsTimer(JsTimerTask),
+    #[cfg(feature = "testbinding")]
     TestBindingCallback(TestBindingCallback),
     FakeRequestAnimationFrame(FakeRequestAnimationFrameCallback),
     RefreshRedirectDue(RefreshRedirectDue),
@@ -89,6 +91,7 @@ impl OneshotTimerCallback {
             OneshotTimerCallback::XhrTimeout(callback) => callback.invoke(can_gc),
             OneshotTimerCallback::EventSourceTimeout(callback) => callback.invoke(),
             OneshotTimerCallback::JsTimer(task) => task.invoke(this, js_timers, can_gc),
+            #[cfg(feature = "testbinding")]
             OneshotTimerCallback::TestBindingCallback(callback) => callback.invoke(),
             OneshotTimerCallback::FakeRequestAnimationFrame(callback) => callback.invoke(can_gc),
             OneshotTimerCallback::RefreshRedirectDue(callback) => callback.invoke(can_gc),