Maintain child dependent ComputedStyle flags if propagation stops.

Source/core/style/ComputedStyle.cpp

Index: Source/core/style/ComputedStyle.cpp
diff --git a/Source/core/style/ComputedStyle.cpp b/Source/core/style/ComputedStyle.cpp
index 0dd637c5d032543bc5d727b228699d93667b8f9f..7970b790cb88a7c615bcc67084d649f2c408801c 100644
--- a/Source/core/style/ComputedStyle.cpp
+++ b/Source/core/style/ComputedStyle.cpp
@@ -1742,4 +1742,11 @@ void ComputedStyle::getBorderEdgeInfo(BorderEdge edges[], bool includeLogicalLef
         !horizontal || includeLogicalLeftEdge);
 }
 
+void ComputedStyle::copyChildDependentFlagsFrom(const ComputedStyle& other)
+{
+    setEmptyState(other.emptyState());
+    if (other.hasExplicitlyInheritedProperties())
+        setHasExplicitlyInheritedProperties();
+}
+
 } // namespace blink