Add an API to set the ColorFilter on a Paint object.

sky/engine/core/painting/LayerDrawLooperBuilder.cpp

 // 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.
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/painting/LayerDrawLooperBuilder.h"
 
 #include "sky/engine/core/painting/DrawLooper.h"
 #include "sky/engine/core/painting/DrawLooperAddLayerCallback.h"
 #include "sky/engine/core/painting/DrawLooperLayerInfo.h"
@@ skipping 15 matching lines @@
 void LayerDrawLooperBuilder::addLayerOnTop(
     DrawLooperLayerInfo* layer_info,
     PassOwnPtr<DrawLooperAddLayerCallback> callback) {
   SkPaint* sk_paint =
       draw_looper_builder_.addLayerOnTop(layer_info->layer_info());
   RefPtr<Paint> paint = Paint::create();
 
   paint->setPaint(*sk_paint);
   callback->handleEvent(paint.get());
   *sk_paint = paint->paint();
-
-  // TODO(mpcomplete): Remove this when we add color filter support to Paint's
-  // API.
-  SkColor skColor = sk_paint->getColor();
-  RefPtr<SkColorFilter> cf = adoptRef(
-      SkColorFilter::CreateModeFilter(skColor, SkXfermode::kSrcIn_Mode));
-  sk_paint->setColorFilter(cf.get());
 }
 
 } // namespace blink