Remove NonCompositedContentHost -- Take 2

Source/core/rendering/RenderLayer.cpp

Index: Source/core/rendering/RenderLayer.cpp
diff --git a/Source/core/rendering/RenderLayer.cpp b/Source/core/rendering/RenderLayer.cpp
index 17edf636a3a2c9e7116f6987e2195b220b1c5311..abac8916fa2bd912ad0977fc46ad2537898def36 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -1510,13 +1510,8 @@ void RenderLayer::setFilterBackendNeedsRepaintingInRect(const LayoutRect& rect)
     LayoutRect parentLayerRect = renderer()->localToContainerQuad(repaintQuad, parentLayer->renderer()).enclosingBoundingBox();
     
     if (parentLayer->isComposited()) {
-        if (!parentLayer->backing()->paintsIntoWindow()) {
-            parentLayer->setBackingNeedsRepaintInRect(parentLayerRect);
-            return;
-        }
-        // If the painting goes to window, redirect the painting to the parent RenderView.
-        parentLayer = renderer()->view()->layer();
-        parentLayerRect = renderer()->localToContainerQuad(repaintQuad, parentLayer->renderer()).enclosingBoundingBox();
+        parentLayer->setBackingNeedsRepaintInRect(parentLayerRect);
+        return;
     }
 
     if (parentLayer->paintsWithFilters()) {
@@ -3585,8 +3580,7 @@ void RenderLayer::paintLayer(GraphicsContext* context, const LayerPaintingInfo&
         // but we need to ensure that we don't cache clip rects computed with the wrong root in this case.
         if (context->updatingControlTints() || (paintingInfo.paintBehavior & PaintBehaviorFlattenCompositingLayers))
             paintFlags |= PaintLayerTemporaryClipRects;
-        else if (!backing()->paintsIntoWindow()
-            && !backing()->paintsIntoCompositedAncestor()
+        else if (!backing()->paintsIntoCompositedAncestor()
             && !shouldDoSoftwarePaint(this, paintFlags & PaintLayerPaintingReflection)) {
             // If this RenderLayer should paint into its backing, that will be done via RenderLayerBacking::paintIntoLayer().
             return;
@@ -5498,8 +5492,7 @@ GraphicsLayer* RenderLayer::layerForScrollCorner() const
 
 bool RenderLayer::paintsWithTransform(PaintBehavior paintBehavior) const
 {
-    bool paintsToWindow = !isComposited() || backing()->paintsIntoWindow();
-    return transform() && ((paintBehavior & PaintBehaviorFlattenCompositingLayers) || paintsToWindow);
+    return transform() && ((paintBehavior & PaintBehaviorFlattenCompositingLayers) || !isComposited());
 }
 
 bool RenderLayer::backgroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect) const
@@ -5755,14 +5748,7 @@ void RenderLayer::repaintIncludingDescendants()
 void RenderLayer::setBackingNeedsRepaint()
 {
     ASSERT(isComposited());
-    if (backing()->paintsIntoWindow()) {
-        // If we're trying to repaint the placeholder document layer, propagate the
-        // repaint to the native view system.
-        RenderView* view = renderer()->view();
-        if (view)
-            view->repaintViewRectangle(absoluteBoundingBox());
-    } else
-        backing()->setContentsNeedDisplay();
+    backing()->setContentsNeedDisplay();
 }
 
 void RenderLayer::setBackingNeedsRepaintInRect(const LayoutRect& r)
@@ -5770,7 +5756,7 @@ void RenderLayer::setBackingNeedsRepaintInRect(const LayoutRect& r)
     // https://bugs.webkit.org/show_bug.cgi?id=61159 describes an unreproducible crash here,
     // so assert but check that the layer is composited.
     ASSERT(isComposited());
-    if (!isComposited() || backing()->paintsIntoWindow()) {
+    if (!isComposited()) {
         // If we're trying to repaint the placeholder document layer, propagate the
         // repaint to the native view system.
         LayoutRect absRect(r);