Bug 1463605 - Set mMayHaveOpacityAnimation and mMayHaveTransformAnimation flag to continuation or IB split sibling frames too. r=birtles

Without this fix layout/reftests/css-animations/ib-split-sibling-opacity.html
would have failed if the next change in this patch series is applied.

MozReview-Commit-ID: CFNXePkXuOs

--HG--
extra : rebase_source : 48df6bf107e1a14dd2b2ae7c23d38d29581aabcb

dom/animation/KeyframeEffect.cpp

@@ -1785,14 +1785,16 @@ KeyframeEffect::UpdateEffectSet(EffectSet* aEffectSet) const
   nsIFrame* frame = GetStyleFrame();
   if (HasAnimationOfProperty(eCSSProperty_opacity)) {
     effectSet->SetMayHaveOpacityAnimation();
-    if (frame) {
+    while (frame) {
       frame->SetMayHaveOpacityAnimation();
+      frame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(frame);
     }
   }
   if (HasAnimationOfProperty(eCSSProperty_transform)) {
     effectSet->SetMayHaveTransformAnimation();
-    if (frame) {
+    while (frame) {
       frame->SetMayHaveTransformAnimation();
+      frame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(frame);
     }
   }
 }