Layers that have a backdrop-filter should paints contents

third_party/WebKit/Source/core/paint/BoxDecorationData.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/BoxDecorationData.h"
 
 #include "core/layout/LayoutBox.h"
 #include "core/style/BorderEdge.h"
 #include "core/style/ComputedStyle.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/graphics/GraphicsContext.h"
 
 namespace blink {
 
 BoxDecorationData::BoxDecorationData(const LayoutBox& layoutBox)
 {
     backgroundColor = layoutBox.style()->visitedDependentColor(CSSPropertyBackgroundColor);
-    hasBackground = backgroundColor.alpha() || layoutBox.style()->hasBackgroundImage();
+    hasBackground = backgroundColor.alpha() || layoutBox.style()->hasBackgroundImageOrBackdropFilter();
     ASSERT(hasBackground == layoutBox.style()->hasBackground());
     hasBorderDecoration = layoutBox.style()->hasBorderDecoration();
     hasAppearance = layoutBox.style()->hasAppearance();
     bleedAvoidance = determineBackgroundBleedAvoidance(layoutBox);
 }
 
 namespace {
 
 bool borderObscuresBackgroundEdge(const ComputedStyle& style)
 {
@@ skipping 24 matching lines @@
         return BackgroundBleedNone;
     }
 
     if (borderObscuresBackgroundEdge(*layoutBox.style()))
         return BackgroundBleedShrinkBackground;
 
     return BackgroundBleedClipLayer;
 }
 
 } // namespace blink