Implement ColorFilter in widgets/basic.dart

sky/sdk/lib/widgets/basic.dart

Index: sky/sdk/lib/widgets/basic.dart
diff --git a/sky/sdk/lib/widgets/basic.dart b/sky/sdk/lib/widgets/basic.dart
index 2f221b7688b8d1d7b95078118f658fb1cd79f0df..69e403261c4aa4ff2adf0df54bbe54226122d02c 100644
--- a/sky/sdk/lib/widgets/basic.dart
+++ b/sky/sdk/lib/widgets/basic.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:sky' as sky;
+
 import 'package:vector_math/vector_math.dart';
 
 import '../painting/text_style.dart';
@@ -36,6 +38,23 @@ class Opacity extends OneChildRenderObjectWrapper {
   }
 }
 
+class ColorFilter extends OneChildRenderObjectWrapper {
+  ColorFilter({ String key, this.color, this.transferMode, Widget child })
+    : super(key: key, child: child);
+
+  RenderColorFilter get root => super.root;
+  final Color color;
+  final sky.TransferMode transferMode;
+
+  RenderColorFilter createNode() => new RenderColorFilter(color: color, transferMode: transferMode);
+
+  void syncRenderObject(ColorFilter old) {
+    super.syncRenderObject(old);
+    root.color = color;
+    root.transferMode = transferMode;
+  }
+}
+
 class DecoratedBox extends OneChildRenderObjectWrapper {
 
   DecoratedBox({ String key, this.decoration, Widget child })