Don't include descendants into LocalVisualRect if a box has both mask and overflow clip

third_party/WebKit/Source/core/layout/LayoutBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc.
  *               All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2417 matching lines @@
   if (HasLayer() && Layer()->GetCompositingState() == kPaintsIntoOwnBacking)
     return false;
 
   return true;
 }
 
 LayoutRect LayoutBox::LocalVisualRect() const {
   if (Style()->Visibility() != EVisibility::kVisible)
     return LayoutRect();
 
-  if (HasMask() && !RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+  if (HasMask() && !ShouldClipOverflow() &&
+      !RuntimeEnabledFeatures::slimmingPaintV2Enabled())
     return LayoutRect(Layer()->BoxForFilterOrMask());
+
   return SelfVisualOverflowRect();
 }
 
 void LayoutBox::InflateVisualRectForFilterUnderContainer(
     TransformState& transform_state,
     const LayoutObject& container,
     const LayoutBoxModelObject* ancestor_to_stop_at) const {
   transform_state.Flatten();
   // Apply visual overflow caused by reflections and filters defined on objects
   // between this object and container (not included) or ancestorToStopAt
@@ skipping 3448 matching lines @@
 void LayoutBox::MutableForPainting::
     SavePreviousContentBoxSizeAndLayoutOverflowRect() {
   auto& rare_data = GetLayoutBox().EnsureRareData();
   rare_data.has_previous_content_box_size_and_layout_overflow_rect_ = true;
   rare_data.previous_content_box_size_ = GetLayoutBox().ContentBoxRect().Size();
   rare_data.previous_layout_overflow_rect_ =
       GetLayoutBox().LayoutOverflowRect();
 }
 
 }  // namespace blink