2 files changed, 10 insertions, 0 deletions
diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index 4d6579a89..43f11c031 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -2932,6 +2932,15 @@ nsDocument::AreWebAnimationsTimelinesEnabled(JSContext* /*unused*/, JSObject* /*
          Preferences::GetBool("dom.animations-api.timelines.enabled");
 }
 
+bool
+nsDocument::AreWebAnimationsImplicitKeyframesEnabled(JSContext* /*unused*/, JSObject* /*unused*/)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  return nsContentUtils::IsCallerChrome() ||
+         Preferences::GetBool("dom.animations-api.implicit-keyframes.enabled");
+}
+
 DocumentTimeline*
 nsDocument::Timeline()
 {
diff --git a/dom/base/nsDocument.h b/dom/base/nsDocument.h
index a1fb04c6b..f544166c2 100644
--- a/dom/base/nsDocument.h
+++ b/dom/base/nsDocument.h
@@ -433,6 +433,7 @@ public:
 
   static bool IsElementAnimateEnabled(JSContext* aCx, JSObject* aObject);
   static bool IsWebAnimationsEnabled(JSContext* aCx, JSObject* aObject);
+  static bool AreWebAnimationsImplicitKeyframesEnabled(JSContext* aCx, JSObject* aObject);
   static bool AreWebAnimationsTimelinesEnabled(JSContext* aCx, JSObject* aObject);
 
   virtual mozilla::dom::DocumentTimeline* Timeline() override;