Make rendering use PaintingNodes for increased efficiency.

sky/engine/core/painting/PictureRecorder.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/core/painting/Canvas.h"
 #include "sky/engine/core/painting/Drawable.h"
 #include "sky/engine/core/painting/Picture.h"
 #include "sky/engine/core/painting/PictureRecorder.h"
 
 namespace blink {
 
 PictureRecorder::PictureRecorder()
     : m_pictureRecorder(adoptPtr(new SkPictureRecorder()))
 {
 }
 
 PictureRecorder::~PictureRecorder()
 {
 }
 
 bool PictureRecorder::isRecording() {
     return m_canvas && m_canvas->isRecording();
 }
 
-SkCanvas* PictureRecorder::beginRecording(double width, double height)
+SkCanvas* PictureRecorder::beginRecording(Rect bounds)
 {
-    return m_pictureRecorder->beginRecording(width, height);
+    return m_pictureRecorder->beginRecording(bounds.sk_rect);
 }
 
 PassRefPtr<Picture> PictureRecorder::endRecording()
 {
     if (!isRecording())
         return nullptr;
     RefPtr<Picture> picture = Picture::create(
         adoptRef(m_pictureRecorder->endRecording()));
     m_canvas->clearSkCanvas();
     m_canvas = nullptr;
     return picture.release();
 }
 
 PassRefPtr<Drawable> PictureRecorder::endRecordingAsDrawable()
 {
     if (!isRecording())
         return nullptr;
     RefPtr<Drawable> drawable = Drawable::create(
         adoptRef(m_pictureRecorder->endRecordingAsDrawable()));
     m_canvas->clearSkCanvas();
     m_canvas = nullptr;
     return drawable.release();
 }
 
 void PictureRecorder::set_canvas(PassRefPtr<Canvas> canvas) { m_canvas = canvas; }
 
 } // namespace blink