Layers that have a backdrop-filter should paints contents

third_party/WebKit/Source/core/style/ComputedStyle.h

Index: third_party/WebKit/Source/core/style/ComputedStyle.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.h b/third_party/WebKit/Source/core/style/ComputedStyle.h
index 7aa2d25f8ed0f5c7f6a2a93eade37108fe25b0c4..b5e0ba7fd68970370f59779d9a81aaca9fae6b05 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -1627,7 +1627,7 @@ public:
     bool hasChildDependentFlags() const { return emptyState() || hasExplicitlyInheritedProperties(); }
     void copyChildDependentFlagsFrom(const ComputedStyle&);
 
-    bool hasBoxDecorations() const { return hasBorderDecoration() || hasBorderRadius() || hasOutline() || hasAppearance() || boxShadow() || hasFilter() || resize() != RESIZE_NONE; }
+    bool hasBoxDecorations() const { return hasBorderDecoration() || hasBorderRadius() || hasOutline() || hasAppearance() || boxShadow() || hasFilter() || hasBackdropFilter() || resize() != RESIZE_NONE; }
 
     bool borderObscuresBackground() const;
     void getBorderEdgeInfo(BorderEdge edges[], bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true) const;