script: Limit public exports. (#34915)

* script: Restrict reexport visibility of DOM types.

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

* script: Mass pub->pub(crate) conversion.

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

* script: Hide existing dead code warnings.

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

* Formatting.

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

* Fix clippy warnings.

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

* Formatting.

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

* Fix unit tests.

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

* Fix clippy.

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

* More formatting.

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

---------

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

components/script/stylesheet_set.rs

@@ -8,7 +8,7 @@ use style::stylesheet_set::{AuthorStylesheetSet, DocumentStylesheetSet};
 use style::stylesheets::StylesheetInDocument;
 
 /// Functionality common to DocumentStylesheetSet and AuthorStylesheetSet.
-pub enum StylesheetSetRef<'a, S>
+pub(crate) enum StylesheetSetRef<'a, S>
 where
     S: StylesheetInDocument + PartialEq + 'static,
 {
@@ -25,7 +25,7 @@ where
     /// Appends a new stylesheet to the current set.
     ///
     /// No device implies not computing invalidations.
-    pub fn append_stylesheet(
+    pub(crate) fn append_stylesheet(
         &mut self,
         device: Option<&Device>,
         sheet: S,
@@ -38,7 +38,7 @@ where
     }
 
     /// Insert a given stylesheet before another stylesheet in the document.
-    pub fn insert_stylesheet_before(
+    pub(crate) fn insert_stylesheet_before(
         &mut self,
         device: Option<&Device>,
         sheet: S,
@@ -56,7 +56,7 @@ where
     }
 
     /// Remove a given stylesheet from the set.
-    pub fn remove_stylesheet(
+    pub(crate) fn remove_stylesheet(
         &mut self,
         device: Option<&Device>,
         sheet: S,