Add support for converting cc::FilterOperations into an SkImageFilter

cc/trees/layer_tree_host_common.cc

Index: cc/trees/layer_tree_host_common.cc
diff --git a/cc/trees/layer_tree_host_common.cc b/cc/trees/layer_tree_host_common.cc
index b8436756fc4762df4194493b3d602e274a8d1ab3..2178b0cf4408779b6d1412eb650e2f93e62fd2aa 100644
--- a/cc/trees/layer_tree_host_common.cc
+++ b/cc/trees/layer_tree_host_common.cc
@@ -555,8 +555,7 @@ static bool SubtreeShouldRenderToSeparateSurface(
   }
 
   // If the layer uses a CSS filter.
-  if (!layer->filters().IsEmpty() || !layer->background_filters().IsEmpty() ||
-      layer->filter()) {
+  if (!layer->filters().IsEmpty() || !layer->background_filters().IsEmpty()) {
     DCHECK(!is_root);
     return true;
   }
@@ -1548,7 +1547,8 @@ static void CalculateDrawPropertiesInternal(
 
     // TODO(senorblanco): make this smarter for the SkImageFilter case (check
     // for pixel-moving filters)
-    if (layer->filters().HasFilterThatMovesPixels() || layer->filter())
+    if (layer->filters().HasReferenceFilter() ||
+        layer->filters().HasFilterThatMovesPixels())
       nearest_ancestor_surface_that_moves_pixels = render_surface;
 
     render_surface->SetNearestAncestorThatMovesPixels(