Implement sk_sp<SkImageFilter> StructTraits

skia/public/interfaces/test/traits_test_service.mojom

 // Copyright 2016 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.
 
-module gfx.mojom;
+module skia.mojom;
 
-import "ui/gfx/mojo/selection_bound.mojom";
-import "ui/gfx/mojo/transform.mojom";
+import "skia/public/interfaces/image_filter.mojom";
 
 // All functions on this interface echo their arguments to test StructTraits
 // serialization and deserialization.
 interface TraitsTestService {
   [Sync]
-  EchoSelectionBound(SelectionBound s) => (SelectionBound pass);
-
-  [Sync]
-  EchoTransform(Transform t) => (Transform pass);
+  EchoImageFilter(ImageFilter b) => (ImageFilter pass);
 };