Implement -webkit-box-reflect as a filter.

third_party/WebKit/Source/core/paint/PaintLayerPainter.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/PaintLayerPainter.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/layout/ClipPathOperation.h"
 #include "core/layout/LayoutBlock.h"
@@ skipping 90 matching lines @@
 
 PaintLayerPainter::PaintResult PaintLayerPainter::paintLayerContentsAndReflection(GraphicsContext& context, const PaintLayerPaintingInfo& paintingInfo, PaintLayerFlags paintFlags, FragmentPolicy fragmentPolicy)
 {
     ASSERT(m_paintLayer.isSelfPaintingLayer() || m_paintLayer.hasSelfPaintingLayerDescendant());
 
     PaintLayerFlags localPaintFlags = paintFlags & ~(PaintLayerAppliedTransform);
 
     PaintResult result = FullyPainted;
 
     // Paint the reflection first if we have one.
-    if (m_paintLayer.reflectionInfo()) {
+    if (m_paintLayer.reflectionInfo() && !RuntimeEnabledFeatures::cssBoxReflectFilterEnabled()) {
         ScopeRecorder scopeRecorder(context);
         if (m_paintLayer.reflectionInfo()->paint(context, paintingInfo, localPaintFlags) == MayBeClippedByPaintDirtyRect)
             result = MayBeClippedByPaintDirtyRect;
     }
 
     localPaintFlags |= PaintLayerPaintingCompositingAllPhases;
     if (paintLayerContents(context, paintingInfo, localPaintFlags, fragmentPolicy) == MayBeClippedByPaintDirtyRect)
         result = MayBeClippedByPaintDirtyRect;
 
     return result;
@@ skipping 652 matching lines @@
     if (!m_paintLayer.containsDirtyOverlayScrollbars())
         return;
 
     PaintLayerPaintingInfo paintingInfo(&m_paintLayer, LayoutRect(enclosingIntRect(damageRect)), paintFlags, LayoutSize());
     paintLayer(context, paintingInfo, PaintLayerPaintingOverlayScrollbars);
 
     m_paintLayer.setContainsDirtyOverlayScrollbars(false);
 }
 
 } // namespace blink