Decouple Canvas from DisplayList and map Picture and PictureRecorder more directly to their Skia co…

sky/engine/core/painting/Picture.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/Picture.h"
 
 #include "base/logging.h"
 
 namespace blink {
 
-PassRefPtr<Picture> Picture::create(PassRefPtr<DisplayList> list)
+PassRefPtr<Picture> Picture::create(PassRefPtr<SkPicture> skPicture)
 {
-    ASSERT(list);
-    return adoptRef(new Picture(list));
+    ASSERT(skPicture);
+    return adoptRef(new Picture(skPicture));
 }
 
-Picture::Picture(PassRefPtr<DisplayList> list)
-    : m_displayList(list)
+Picture::Picture(PassRefPtr<SkPicture> skPicture)
+    : m_picture(skPicture)
 {
 }
 
 Picture::~Picture()
 {
 }
 
 } // namespace blink