diff --git a/sky/engine/bindings/dart_ui.cc b/sky/engine/bindings/dart_ui.cc
index b7e71288c282ead76666f03417e40dcbe5aff48c..7387929cd29fdea0186ca9cec15b65a92240b791 100644
--- a/sky/engine/bindings/dart_ui.cc
+++ b/sky/engine/bindings/dart_ui.cc
@@ -8,6 +8,8 @@
 #include "sky/engine/bindings/dart_runtime_hooks.h"
 #include "sky/engine/core/compositing/Scene.h"
 #include "sky/engine/core/compositing/SceneBuilder.h"
+#include "sky/engine/core/painting/DrawLooperLayerInfo.h"
+#include "sky/engine/core/painting/LayerDrawLooperBuilder.h"
 #include "sky/engine/core/painting/painting.h"
 #include "sky/engine/core/text/Paragraph.h"
 #include "sky/engine/core/text/ParagraphBuilder.h"
@@ -42,6 +44,8 @@ void DartUI::InitForIsolate() {
   if (!g_natives) {
     g_natives = new DartLibraryNatives();
     DartRuntimeHooks::RegisterNatives(g_natives);
+    DrawLooperLayerInfo::RegisterNatives(g_natives);
+    LayerDrawLooperBuilder::RegisterNatives(g_natives);
     Painting::RegisterNatives(g_natives);
     Paragraph::RegisterNatives(g_natives);
     ParagraphBuilder::RegisterNatives(g_natives);
diff --git a/sky/engine/core/core.gni b/sky/engine/core/core.gni
index 32225c9e696cfd20d11baaac1c412b5955a9781e..6eb3e383a0dbe5eefdd5cb189a9ce52651675bde 100644
--- a/sky/engine/core/core.gni
+++ b/sky/engine/core/core.gni
@@ -236,12 +236,9 @@ sky_core_files = [
 core_idl_files = get_path_info([
                                  "painting/Canvas.idl",
                                  "painting/ColorFilter.idl",
-                                 "painting/DrawLooper.idl",
-                                 "painting/DrawLooperLayerInfo.idl",
                                  "painting/Gradient.idl",
                                  "painting/Image.idl",
                                  "painting/ImageShader.idl",
-                                 "painting/LayerDrawLooperBuilder.idl",
                                  "painting/MaskFilter.idl",
                                  "painting/Path.idl",
                                  "painting/Picture.idl",
@@ -261,7 +258,6 @@ core_dart_files = get_path_info([
                                   "dart/window.dart",
                                   "painting/Color.dart",
                                   "painting/ColorFilter.dart",
-                                  "painting/DrawLooperLayerInfo.dart",
                                   "painting/FilterQuality.dart",
                                   "painting/Gradient.dart",
                                   "painting/ImageShader.dart",
diff --git a/sky/engine/core/dart/painting.dart b/sky/engine/core/dart/painting.dart
index a63fa9405dfe2b8a4f3dee8309ed2cd3d4dca06b..f2e8d7dc341d74100c7f3ab9410048b29ff214cf 100644
--- a/sky/engine/core/dart/painting.dart
+++ b/sky/engine/core/dart/painting.dart
@@ -11,3 +11,42 @@ void decodeImageFromDataPipe(int handle, _ImageDecoderCallback callback)
 
 void decodeImageFromList(Uint8List list, _ImageDecoderCallback callback)
     native "decodeImageFromList";
+
+abstract class DrawLooper extends NativeFieldWrapperClass2 {
+}
+
+/// Paint masks for DrawLooperLayerInfo.setPaintBits. These specify which
+/// aspects of the layer's paint should replace the corresponding aspects on
+/// the draw's paint.
+///
+/// PaintBits.all means use the layer's paint completely.
+/// 0 means ignore the layer's paint... except for colorMode, which is
+/// always applied.
+class PaintBits {
+  static const int style       = 0x1;
+  static const int testSkewx   = 0x2;
+  static const int pathEffect  = 0x4;
+  static const int maskFilter  = 0x8;
+  static const int shader      = 0x10;
+  static const int colorFilter = 0x20;
+  static const int xfermode    = 0x40;
+  static const int all         = 0xFFFFFFFF;
+}
+
+class DrawLooperLayerInfo extends NativeFieldWrapperClass2 {
+  void _constructor() native "DrawLooperLayerInfo_constructor";
+  DrawLooperLayerInfo() { _constructor(); }
+
+  void setPaintBits(int bits) native "DrawLooperLayerInfo_setPaintBits";
+  void setColorMode(TransferMode mode) native "DrawLooperLayerInfo_setColorMode";
+  void setOffset(Offset offset) native "DrawLooperLayerInfo_setOffset";
+  void setPostTranslate(bool postTranslate) native "DrawLooperLayerInfo_setPostTranslate";
+}
+
+class LayerDrawLooperBuilder extends NativeFieldWrapperClass2 {
+  void _constructor() native "LayerDrawLooperBuilder_constructor";
+  LayerDrawLooperBuilder() { _constructor(); }
+
+  DrawLooper build() native "LayerDrawLooperBuilder_build";
+  void addLayerOnTop(DrawLooperLayerInfo info, Paint paint) native "LayerDrawLooperBuilder_addLayerOnTop";
+}
diff --git a/sky/engine/core/painting/DrawLooper.cpp b/sky/engine/core/painting/DrawLooper.cpp
index 64c0041ca541644a021a42136fb0a320e2d0db47..c65c4ec35c85af7c2c9678a4c25e49f7e668f497 100644
--- a/sky/engine/core/painting/DrawLooper.cpp
+++ b/sky/engine/core/painting/DrawLooper.cpp
@@ -6,6 +6,8 @@
 
 namespace blink {
 
+IMPLEMENT_WRAPPERTYPEINFO(DrawLooper);
+
 DrawLooper::DrawLooper(PassRefPtr<SkDrawLooper> looper)
     : looper_(looper) {
 }
diff --git a/sky/engine/core/painting/DrawLooper.idl b/sky/engine/core/painting/DrawLooper.idl
deleted file mode 100644
index 8fbda9d1f82e171b595c0d03c1eb0dc652f24f23..0000000000000000000000000000000000000000
--- a/sky/engine/core/painting/DrawLooper.idl
+++ /dev/null
@@ -1,6 +0,0 @@
-// Copyright 2015 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.
-
-interface DrawLooper {
-};
diff --git a/sky/engine/core/painting/DrawLooperLayerInfo.cpp b/sky/engine/core/painting/DrawLooperLayerInfo.cpp
index 32494e2799f57b23f894d0264e5468d18bc4195c..785d0dbda36d2dc9e4b6203debfe916046684b3c 100644
--- a/sky/engine/core/painting/DrawLooperLayerInfo.cpp
+++ b/sky/engine/core/painting/DrawLooperLayerInfo.cpp
@@ -3,9 +3,34 @@
 // found in the LICENSE file.
 
 #include "sky/engine/core/painting/DrawLooperLayerInfo.h"
+#include "sky/engine/tonic/dart_args.h"
+#include "sky/engine/tonic/dart_binding_macros.h"
+#include "sky/engine/tonic/dart_converter.h"
+#include "sky/engine/tonic/dart_library_natives.h"
 
 namespace blink {
 
+static void DrawLooperLayerInfo_constructor(Dart_NativeArguments args) {
+  DartCallConstructor(&DrawLooperLayerInfo::create, args);
+}
+
+IMPLEMENT_WRAPPERTYPEINFO(DrawLooperLayerInfo);
+
+#define FOR_EACH_BINDING(V) \
+  V(DrawLooperLayerInfo, setPaintBits) \
+  V(DrawLooperLayerInfo, setColorMode) \
+  V(DrawLooperLayerInfo, setOffset) \
+  V(DrawLooperLayerInfo, setPostTranslate)
+
+FOR_EACH_BINDING(DART_NATIVE_CALLBACK)
+
+void DrawLooperLayerInfo::RegisterNatives(DartLibraryNatives* natives) {
+  natives->Register({
+    { "DrawLooperLayerInfo_constructor", DrawLooperLayerInfo_constructor, 1, true },
+FOR_EACH_BINDING(DART_REGISTER_NATIVE)
+  });
+}
+
 DrawLooperLayerInfo::DrawLooperLayerInfo() {
 }
 
diff --git a/sky/engine/core/painting/DrawLooperLayerInfo.dart b/sky/engine/core/painting/DrawLooperLayerInfo.dart
deleted file mode 100644
index 625e0339e4987ea3c1ef939f4885646bf410c2cf..0000000000000000000000000000000000000000
--- a/sky/engine/core/painting/DrawLooperLayerInfo.dart
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2015 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.
-
-part of dart_ui;
-
-/// Paint masks for DrawLooperLayerInfo.setPaintBits. These specify which
-/// aspects of the layer's paint should replace the corresponding aspects on
-/// the draw's paint.
-///
-/// PaintBits.all means use the layer's paint completely.
-/// 0 means ignore the layer's paint... except for colorMode, which is
-/// always applied.
-class PaintBits {
-  static const int style       = 0x1;
-  static const int testSkewx   = 0x2;
-  static const int pathEffect  = 0x4;
-  static const int maskFilter  = 0x8;
-  static const int shader      = 0x10;
-  static const int colorFilter = 0x20;
-  static const int xfermode    = 0x40;
-  static const int all         = 0xFFFFFFFF;
-}
diff --git a/sky/engine/core/painting/DrawLooperLayerInfo.h b/sky/engine/core/painting/DrawLooperLayerInfo.h
index 4879357761e526e46bbea33263700dc74239209a..fc131cbb6079ac951708e73d4268fa43fc078345 100644
--- a/sky/engine/core/painting/DrawLooperLayerInfo.h
+++ b/sky/engine/core/painting/DrawLooperLayerInfo.h
@@ -13,6 +13,7 @@
 #include "third_party/skia/include/effects/SkLayerDrawLooper.h"
 
 namespace blink {
+class DartLibraryNatives;
 
 class DrawLooperLayerInfo : public RefCounted<DrawLooperLayerInfo>,
                             public DartWrappable {
@@ -25,12 +26,14 @@ class DrawLooperLayerInfo : public RefCounted<DrawLooperLayerInfo>,
   ~DrawLooperLayerInfo() override;
 
   void setPaintBits(unsigned bits) { layer_info_.fPaintBits = bits; }
-  void setColorMode(SkXfermode::Mode mode) { layer_info_.fColorMode = mode; }
+  void setColorMode(TransferMode mode) { layer_info_.fColorMode = mode; }
   void setOffset(Offset offset) { layer_info_.fOffset = SkPoint::Make(offset.sk_size.width(), offset.sk_size.height()); }
   void setPostTranslate(bool val) { layer_info_.fPostTranslate = val; }
 
   const SkLayerDrawLooper::LayerInfo& layer_info() const { return layer_info_; }
 
+  static void RegisterNatives(DartLibraryNatives* natives);
+
  private:
   DrawLooperLayerInfo();
 
diff --git a/sky/engine/core/painting/DrawLooperLayerInfo.idl b/sky/engine/core/painting/DrawLooperLayerInfo.idl
deleted file mode 100644
index c90b9eeddb025ca0b5d634c4df32a5c5221297f3..0000000000000000000000000000000000000000
--- a/sky/engine/core/painting/DrawLooperLayerInfo.idl
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2015 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.
-
-[
-  Constructor(),
-] interface DrawLooperLayerInfo {
-  // Specifies which aspects of the layer's paint should replace the
-  // corresponding aspects on the draw's paint. Use PaintBits, defined in
-  // DrawLooperLayerInfo.dart.
-  void setPaintBits(unsigned long bits);
-  void setColorMode(TransferMode mode);
-  void setOffset(Offset offset);
-  void setPostTranslate(boolean postTranslate);
-};
diff --git a/sky/engine/core/painting/LayerDrawLooperBuilder.cpp b/sky/engine/core/painting/LayerDrawLooperBuilder.cpp
index 64b6efa91ac2151e26d85f650e23296a80edc0ba..27f2b85816aab50f7b6fd0a8548341d7df49b1e1 100644
--- a/sky/engine/core/painting/LayerDrawLooperBuilder.cpp
+++ b/sky/engine/core/painting/LayerDrawLooperBuilder.cpp
@@ -7,10 +7,33 @@
 #include "sky/engine/core/painting/DrawLooper.h"
 #include "sky/engine/core/painting/DrawLooperLayerInfo.h"
 #include "sky/engine/core/painting/Paint.h"
+#include "sky/engine/tonic/dart_args.h"
+#include "sky/engine/tonic/dart_binding_macros.h"
+#include "sky/engine/tonic/dart_converter.h"
+#include "sky/engine/tonic/dart_library_natives.h"
 #include "third_party/skia/include/core/SkColorFilter.h"
 
 namespace blink {
 
+static void LayerDrawLooperBuilder_constructor(Dart_NativeArguments args) {
+  DartCallConstructor(&LayerDrawLooperBuilder::create, args);
+}
+
+IMPLEMENT_WRAPPERTYPEINFO(LayerDrawLooperBuilder);
+
+#define FOR_EACH_BINDING(V) \
+  V(LayerDrawLooperBuilder, build) \
+  V(LayerDrawLooperBuilder, addLayerOnTop)
+
+FOR_EACH_BINDING(DART_NATIVE_CALLBACK)
+
+void LayerDrawLooperBuilder::RegisterNatives(DartLibraryNatives* natives) {
+  natives->Register({
+    { "LayerDrawLooperBuilder_constructor", LayerDrawLooperBuilder_constructor, 1, true },
+FOR_EACH_BINDING(DART_REGISTER_NATIVE)
+  });
+}
+
 LayerDrawLooperBuilder::LayerDrawLooperBuilder() {
 }
 
diff --git a/sky/engine/core/painting/LayerDrawLooperBuilder.h b/sky/engine/core/painting/LayerDrawLooperBuilder.h
index a77f7034ae1e15e59f088f0dcdb83c3a8c63395b..662389a2e176afb28bbe04006112d5152409ed63 100644
--- a/sky/engine/core/painting/LayerDrawLooperBuilder.h
+++ b/sky/engine/core/painting/LayerDrawLooperBuilder.h
@@ -12,7 +12,7 @@
 #include "third_party/skia/include/effects/SkLayerDrawLooper.h"
 
 namespace blink {
-
+class DartLibraryNatives;
 class DrawLooper;
 class DrawLooperLayerInfo;
 
@@ -28,6 +28,8 @@ class LayerDrawLooperBuilder : public RefCounted<LayerDrawLooperBuilder>,
   PassRefPtr<DrawLooper> build();
   void addLayerOnTop(DrawLooperLayerInfo* layer_info, const Paint& paint);
 
+  static void RegisterNatives(DartLibraryNatives* natives);
+
  private:
   LayerDrawLooperBuilder();
 
diff --git a/sky/engine/core/painting/LayerDrawLooperBuilder.idl b/sky/engine/core/painting/LayerDrawLooperBuilder.idl
deleted file mode 100644
index b92a71e543f3c4fe58debcbcd8daa7eea3f55cff..0000000000000000000000000000000000000000
--- a/sky/engine/core/painting/LayerDrawLooperBuilder.idl
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2015 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.
-[
-    Constructor()
-] interface LayerDrawLooperBuilder {
-  // Returns a DrawLooper based on the construction operations, and resets the
-  // builder back to a default state.
-  DrawLooper build();
-
-  void addLayerOnTop(DrawLooperLayerInfo info, Paint paint);
-};
diff --git a/sky/engine/core/painting/Paint.cpp b/sky/engine/core/painting/Paint.cpp
index f518e3fc9cdadcc50efa950cc2a1a83556e4a679..73f1ef64e7cffef2c4ee3c1e6e17c18ef826aeb0 100644
--- a/sky/engine/core/painting/Paint.cpp
+++ b/sky/engine/core/painting/Paint.cpp
@@ -102,9 +102,9 @@ Paint DartConverter<Paint>::FromDart(Dart_Handle dart_paint) {
   return result;
 }
 
-Paint DartConverter<Paint>::FromArgumentsWithNullCheck(Dart_NativeArguments args,
-                                                       int index,
-                                                       Dart_Handle& exception) {
+Paint DartConverter<Paint>::FromArguments(Dart_NativeArguments args,
+                                          int index,
+                                          Dart_Handle& exception) {
   Dart_Handle dart_rect = Dart_GetNativeArgument(args, index);
   DCHECK(!LogIfError(dart_rect));
   return FromDart(dart_rect);
diff --git a/sky/engine/core/painting/Paint.h b/sky/engine/core/painting/Paint.h
index d5b83c786e63f8d34f7b678e1ff124934883ee13..d89e1d492bef5f3d07646402524ed395b8545479 100644
--- a/sky/engine/core/painting/Paint.h
+++ b/sky/engine/core/painting/Paint.h
@@ -33,9 +33,14 @@ class Paint {
 template <>
 struct DartConverter<Paint> {
   static Paint FromDart(Dart_Handle handle);
+  static Paint FromArguments(Dart_NativeArguments args,
+                             int index,
+                             Dart_Handle& exception);
   static Paint FromArgumentsWithNullCheck(Dart_NativeArguments args,
                                           int index,
-                                          Dart_Handle& exception);
+                                          Dart_Handle& exception) {
+    return FromArguments(args, index, exception);
+  }
 };
 
 class StrokeCap {};