servo: Merge #20013 - Return whether property was removed from Servo_DeclarationBlock_RemoveProperty (from upsuper:remove-prop-bool); r=bzbarsky

This is the Servo side change of [bug 1435139](https://bugzilla.mozilla.org/show_bug.cgi?id=1435139).

Source-Repo: https://github.com/servo/servo
Source-Revision: afaa51b99387df084da421a738f204fefaebfbab

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : f0a0b143d2750de047e62ab4ee940e791c2826b1

servo/components/style/gecko/generated/bindings.rs

@@ -2840,7 +2840,7 @@ extern "C" {
     pub fn Servo_DeclarationBlock_RemoveProperty(
         declarations: RawServoDeclarationBlockBorrowed,
         property: *const nsACString,
-    );
+    ) -> bool;
 }
 extern "C" {
     pub fn Servo_DeclarationBlock_RemovePropertyById(

servo/ports/geckolib/glue.rs

@@ -2874,8 +2874,8 @@ fn remove_property(
 pub unsafe extern "C" fn Servo_DeclarationBlock_RemoveProperty(
     declarations: RawServoDeclarationBlockBorrowed,
     property: *const nsACString,
-) {
+) -> bool {
-    remove_property(declarations, get_property_id_from_property!(property, ()));
+    remove_property(declarations, get_property_id_from_property!(property, false))
 }
 
 #[no_mangle]