Implement Gecko_StyleAnimationsEquals for checking nsStyleAutoArray<StyleAnimation> equality in servo side.

Later we update CSS animations if this function returns false.

components/style/build_gecko.rs

@@ -539,6 +539,7 @@ mod bindings {
             "RawServoDeclarationBlock",
             "RawGeckoPresContext",
             "RawGeckoPresContextOwned",
+            "RawGeckoStyleAnimationList",
             "GeckoParserExtraData",
             "RefPtr",
             "ThreadSafeURIHolder",
@@ -636,6 +637,7 @@ mod bindings {
             "RawGeckoDocument",
             "RawServoDeclarationBlockStrong",
             "RawGeckoPresContext",
+            "RawGeckoStyleAnimationList",
         ];
         let servo_borrow_types = [
             "nsCSSValue",

components/style/gecko_bindings/bindings.rs

@@ -14,6 +14,7 @@ use gecko_bindings::structs::RawServoAnimationValue;
 use gecko_bindings::structs::RawServoDeclarationBlock;
 use gecko_bindings::structs::RawGeckoPresContext;
 use gecko_bindings::structs::RawGeckoPresContextOwned;
+use gecko_bindings::structs::RawGeckoStyleAnimationList;
 use gecko_bindings::structs::GeckoParserExtraData;
 use gecko_bindings::structs::RefPtr;
 use gecko_bindings::structs::ThreadSafeURIHolder;
@@ -232,6 +233,8 @@ pub type RawServoDeclarationBlockStrongBorrowed<'a> = &'a RawServoDeclarationBlo
 pub type RawServoDeclarationBlockStrongBorrowedOrNull<'a> = Option<&'a RawServoDeclarationBlockStrong>;
 pub type RawGeckoPresContextBorrowed<'a> = &'a RawGeckoPresContext;
 pub type RawGeckoPresContextBorrowedOrNull<'a> = Option<&'a RawGeckoPresContext>;
+pub type RawGeckoStyleAnimationListBorrowed<'a> = &'a RawGeckoStyleAnimationList;
+pub type RawGeckoStyleAnimationListBorrowedOrNull<'a> = Option<&'a RawGeckoStyleAnimationList>;
 pub type nsCSSValueBorrowed<'a> = &'a nsCSSValue;
 pub type nsCSSValueBorrowedOrNull<'a> = Option<&'a nsCSSValue>;
 pub type nsCSSValueBorrowedMut<'a> = &'a mut nsCSSValue;
@@ -531,6 +534,13 @@ extern "C" {
                                       EffectCompositor_CascadeLevel)
      -> RawServoDeclarationBlockStrong;
 }
+extern "C" {
+    pub fn Gecko_StyleAnimationsEquals(arg1:
+                                           RawGeckoStyleAnimationListBorrowed,
+                                       arg2:
+                                           RawGeckoStyleAnimationListBorrowed)
+     -> bool;
+}
 extern "C" {
     pub fn Gecko_Atomize(aString: *const ::std::os::raw::c_char, aLength: u32)
      -> *mut nsIAtom;

components/style/gecko_bindings/structs_debug.rs

@@ -25490,6 +25490,8 @@ pub mod root {
         root::nsTArray<root::mozilla::PropertyStyleAnimationValuePair>;
     pub type RawServoAnimationValueBorrowedList =
         root::nsTArray<*const root::RawServoAnimationValue>;
+    pub type RawGeckoStyleAnimationList =
+        root::nsStyleAutoArray<root::mozilla::StyleAnimation>;
     pub type RawGeckoNodeBorrowed = *const root::RawGeckoNode;
     pub type RawGeckoNodeBorrowedOrNull = *const root::RawGeckoNode;
     pub type RawGeckoElementBorrowed = *const root::RawGeckoElement;
@@ -25508,6 +25510,8 @@ pub mod root {
     pub type RawGeckoKeyframeListBorrowed = *const root::RawGeckoKeyframeList;
     pub type RawGeckoComputedKeyframeValuesListBorrowedMut =
         *mut root::RawGeckoComputedKeyframeValuesList;
+    pub type RawGeckoStyleAnimationListBorrowed =
+        *const root::RawGeckoStyleAnimationList;
     #[repr(C)]
     #[derive(Debug, Copy, Clone)]
     pub struct ElementRuleProcessorData([u8; 0]);

components/style/gecko_bindings/structs_release.rs

@@ -24848,6 +24848,8 @@ pub mod root {
         root::nsTArray<root::mozilla::PropertyStyleAnimationValuePair>;
     pub type RawServoAnimationValueBorrowedList =
         root::nsTArray<*const root::RawServoAnimationValue>;
+    pub type RawGeckoStyleAnimationList =
+        root::nsStyleAutoArray<root::mozilla::StyleAnimation>;
     pub type RawGeckoNodeBorrowed = *const root::RawGeckoNode;
     pub type RawGeckoNodeBorrowedOrNull = *const root::RawGeckoNode;
     pub type RawGeckoElementBorrowed = *const root::RawGeckoElement;
@@ -24866,6 +24868,8 @@ pub mod root {
     pub type RawGeckoKeyframeListBorrowed = *const root::RawGeckoKeyframeList;
     pub type RawGeckoComputedKeyframeValuesListBorrowedMut =
         *mut root::RawGeckoComputedKeyframeValuesList;
+    pub type RawGeckoStyleAnimationListBorrowed =
+        *const root::RawGeckoStyleAnimationList;
     #[repr(C)]
     #[derive(Debug, Copy, Clone)]
     pub struct ElementRuleProcessorData([u8; 0]);

components/style/properties/gecko.mako.rs

@@ -1801,6 +1801,10 @@ fn static_assert() {
     }
     ${impl_transition_count('property', 'Property')}
 
+    pub fn animations_equals(&self, other: &Self) -> bool {
+        unsafe { bindings::Gecko_StyleAnimationsEquals(&self.gecko.mAnimations, &other.gecko.mAnimations) }
+    }
+
     pub fn set_animation_name(&mut self, v: longhands::animation_name::computed_value::T) {
         use nsstring::nsCString;