[LayoutNG] Paint inlines from the fragment tree

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

Index: third_party/WebKit/Source/core/paint/BoxPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/BoxPainter.cpp b/third_party/WebKit/Source/core/paint/BoxPainter.cpp
index 4ec4a3c677611dc0c46509c959637719c0fc512b..6c61fc4d8a91e46f27e3d1bde6cbb0ba1db41054 100644
--- a/third_party/WebKit/Source/core/paint/BoxPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/BoxPainter.cpp
@@ -213,39 +213,6 @@ void BoxPainter::PaintBackground(const PaintInfo& paint_info,
                   bleed_avoidance);
 }
 
-bool BoxPainter::CalculateFillLayerOcclusionCulling(
-    FillLayerOcclusionOutputList& reversed_paint_list,
-    const FillLayer& fill_layer) {
-  bool is_non_associative = false;
-  for (auto current_layer = &fill_layer; current_layer;
-       current_layer = current_layer->Next()) {
-    reversed_paint_list.push_back(current_layer);
-    // Stop traversal when an opaque layer is encountered.
-    // FIXME : It would be possible for the following occlusion culling test to
-    // be more aggressive on layers with no repeat by testing whether the image
-    // covers the layout rect.  Testing that here would imply duplicating a lot
-    // of calculations that are currently done in
-    // LayoutBoxModelObject::paintFillLayer. A more efficient solution might be
-    // to move the layer recursion into paintFillLayer, or to compute the layer
-    // geometry here and pass it down.
-
-    // TODO(trchen): Need to check compositing mode as well.
-    if (current_layer->BlendMode() != kWebBlendModeNormal)
-      is_non_associative = true;
-
-    // TODO(trchen): A fill layer cannot paint if the calculated tile size is
-    // empty.  This occlusion check can be wrong.
-    if (current_layer->ClipOccludesNextLayers() &&
-        current_layer->ImageOccludesNextLayers(layout_box_.GetDocument(),
-                                               layout_box_.StyleRef())) {
-      if (current_layer->Clip() == kBorderFillBox)
-        is_non_associative = false;
-      break;
-    }
-  }
-  return is_non_associative;
-}
-
 void BoxPainter::PaintFillLayers(const PaintInfo& paint_info,
                                  const Color& c,
                                  const FillLayer& fill_layer,
@@ -255,7 +222,9 @@ void BoxPainter::PaintFillLayers(const PaintInfo& paint_info,
                                  const LayoutObject* background_object) {
   FillLayerOcclusionOutputList reversed_paint_list;
   bool should_draw_background_in_separate_buffer =
-      CalculateFillLayerOcclusionCulling(reversed_paint_list, fill_layer);
+      CalculateFillLayerOcclusionCulling(reversed_paint_list, fill_layer,
+                                         layout_box_.GetDocument(),
+                                         layout_box_.StyleRef());
 
   // TODO(trchen): We can optimize out isolation group if we have a
   // non-transparent background color and the bottom layer encloses all other