Implement -webkit-box-reflect as a filter.

third_party/WebKit/Source/core/layout/PaintInvalidationState.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/layout/PaintInvalidationState.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutPart.h"
@@ skipping 17 matching lines @@
     if (LayoutObject* container = object.container())
         return container->isAnonymousBlock() && container->styleRef().position() == RelativePosition;
     return false;
 }
 
 static bool supportsCachedOffsets(const LayoutObject& object)
 {
     // TODO(wangxianzhu): Move some conditions to fast path if possible.
     return !object.hasTransformRelatedProperty()
         && !object.hasReflection()
-        && !object.hasFilter()
+        && !object.hasFilterInducingProperty()
         && !object.isLayoutFlowThread()
         && !object.isLayoutMultiColumnSpannerPlaceholder()
         && object.styleRef().position() != FixedPosition
         && !object.styleRef().isFlippedBlocksWritingMode()
         // TODO(crbug.com/598094): Handle this in fast path.
         && !isAbsolutePositionUnderRelativePositionInline(object);
 }
 
 PaintInvalidationState::PaintInvalidationState(const LayoutView& layoutView, Vector<LayoutObject*>& pendingDelayedPaintInvalidations)
     : m_currentObject(layoutView)
@@ skipping 297 matching lines @@
 
 PaintLayer& PaintInvalidationState::enclosingSelfPaintingLayer(const LayoutObject& layoutObject) const
 {
     if (layoutObject.hasLayer() && toLayoutBoxModelObject(layoutObject).hasSelfPaintingLayer())
         return *toLayoutBoxModelObject(layoutObject).layer();
 
     return m_enclosingSelfPaintingLayer;
 }
 
 } // namespace blink