Fixup for https://phabricator.services.mozilla.com/D222533

Signed-off-by: Oriol Brufau <[email protected]>

Author: Loirooriol

style/properties/properties.mako.rs

@@ -2176,7 +2176,7 @@ impl ComputedValuesInner {
 
     /// Gets the logical computed margin from this style.
     #[inline]
-    pub fn logical_margin(&self) -> LogicalMargin<<&computed::LengthPercentageOrAuto> {
+    pub fn logical_margin(&self) -> LogicalMargin<<&computed::Margin> {
         let margin_style = self.get_margin();
         LogicalMargin::from_physical(self.writing_mode, SideOffsets2D::new(
             &margin_style.margin_top,

style/values/generics/length.rs

@@ -532,6 +532,27 @@ pub enum GenericMargin<LP> {
     ),
 }
 
+#[cfg(feature = "servo")]
+impl<LP> GenericMargin<LP> {
+    /// Return true if it is 'auto'.
+    #[inline]
+    pub fn is_auto(&self) -> bool {
+        matches!(self, Self::Auto)
+    }
+}
+
+#[cfg(feature = "servo")]
+impl GenericMargin<crate::values::computed::LengthPercentage> {
+    /// Returns true if the computed value is absolute 0 or 0%.
+    #[inline]
+    pub fn is_definitely_zero(&self) -> bool {
+        match self {
+            Self::LengthPercentage(lp) => lp.is_definitely_zero(),
+            _ => false,
+        }
+    }
+}
+
 impl<LP> SpecifiedValueInfo for GenericMargin<LP>
 where
     LP: SpecifiedValueInfo,