Bug 1463605 - Check continuation or IB split sibling frames in nsDOMWindowUtils::CheckAndClearPaintedState. r=mstange

MozReview-Commit-ID: CgyErEGeZJS

--HG--
extra : rebase_source : 1e179f64a39e0cab6b32074fa6ebf6c1884c8b32

dom/base/nsDOMWindowUtils.cpp

@@ -2907,7 +2907,14 @@ nsDOMWindowUtils::CheckAndClearPaintedState(Element* aElement, bool* aResult)
     }
   }
 
-  *aResult = frame->CheckAndClearPaintedState();
+  while (frame) {
+    if (!frame->CheckAndClearPaintedState()) {
+      *aResult = false;
+      return NS_OK;
+    }
+    frame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(frame);
+  }
+  *aResult = true;
   return NS_OK;
 }