Bug 1643201 - servo: layout_2020: Add support for transitions and animations.

Depends on D78195

Differential Revision: https://phabricator.services.mozilla.com/D78196

servo/components/style/properties/longhands/box.mako.rs

@@ -161,7 +161,6 @@ ${helpers.predefined_type(
     "Time",
     "computed::Time::zero()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::Time::zero()",
     parse_method="parse_non_negative",
     vector=True,
@@ -176,7 +175,6 @@ ${helpers.predefined_type(
     "TimingFunction",
     "computed::TimingFunction::ease()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::TimingFunction::ease()",
     vector=True,
     need_index=True,
@@ -190,7 +188,6 @@ ${helpers.predefined_type(
     "TransitionProperty",
     "computed::TransitionProperty::all()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::TransitionProperty::all()",
     vector=True,
     allow_empty="NotInitial",
@@ -205,7 +202,6 @@ ${helpers.predefined_type(
     "Time",
     "computed::Time::zero()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::Time::zero()",
     vector=True,
     need_index=True,
@@ -221,7 +217,6 @@ ${helpers.predefined_type(
     "AnimationName",
     "computed::AnimationName::none()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::AnimationName::none()",
     vector=True,
     need_index=True,
@@ -236,7 +231,6 @@ ${helpers.predefined_type(
     "Time",
     "computed::Time::zero()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::Time::zero()",
     parse_method="parse_non_negative",
     vector=True,
@@ -253,7 +247,6 @@ ${helpers.predefined_type(
     "TimingFunction",
     "computed::TimingFunction::ease()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::TimingFunction::ease()",
     vector=True,
     need_index=True,
@@ -268,7 +261,6 @@ ${helpers.predefined_type(
     "AnimationIterationCount",
     "computed::AnimationIterationCount::one()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::AnimationIterationCount::one()",
     vector=True,
     need_index=True,
@@ -283,7 +275,6 @@ ${helpers.single_keyword(
     "animation-direction",
     "normal reverse alternate alternate-reverse",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     need_index=True,
     animation_value_type="none",
     vector=True,
@@ -299,7 +290,6 @@ ${helpers.single_keyword(
     "animation-play-state",
     "running paused",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     need_index=True,
     animation_value_type="none",
     vector=True,
@@ -328,7 +318,6 @@ ${helpers.predefined_type(
     "Time",
     "computed::Time::zero()",
     engines="gecko servo-2013 servo-2020",
-    servo_2020_pref="layout.2020.unimplemented",
     initial_specified_value="specified::Time::zero()",
     vector=True,
     need_index=True,

servo/components/style/properties/shorthands/box.mako.rs

@@ -28,7 +28,6 @@ ${helpers.two_properties_shorthand(
          "(https://developer.mozilla.org/en-US/docs/Web/CSS/overflow-clip-box)",
 )}
 
-#[cfg(any(feature = "gecko", feature = "servo-layout-2013"))]
 macro_rules! try_parse_one {
     ($context: expr, $input: expr, $var: ident, $prop_module: ident) => {
         if $var.is_none() {
@@ -43,7 +42,7 @@ macro_rules! try_parse_one {
 }
 
 <%helpers:shorthand name="transition"
-                    engines="gecko servo-2013"
+                    engines="gecko servo-2013 servo-2020"
                     extra_prefixes="moz:layout.css.prefixes.transitions webkit"
                     sub_properties="transition-property transition-duration
                                     transition-timing-function
@@ -189,7 +188,7 @@ macro_rules! try_parse_one {
 </%helpers:shorthand>
 
 <%helpers:shorthand name="animation"
-                    engines="gecko servo-2013"
+                    engines="gecko servo-2013 servo-2020"
                     extra_prefixes="moz:layout.css.prefixes.animations webkit"
                     sub_properties="animation-name animation-duration
                                     animation-timing-function animation-delay