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

sky/engine/core/dom/Element.idl

 // 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.
 
 [
   CustomConstructor,
 ] interface Element : ParentNode {
   readonly attribute DOMString tagName;
 
   boolean hasAttribute(DOMString name);
   [TreatReturnedNullStringAs=Null] DOMString getAttribute(DOMString name);
   [CustomElementCallbacks, RaisesException] void setAttribute(DOMString name, optional DOMString? value);
   [CustomElementCallbacks] void removeAttribute(DOMString name);
 
   sequence<Attr> getAttributes();
 
   readonly attribute ShadowRoot shadowRoot;
 
-  void requestPaint(PaintingCallback callback);
-
   void setNeedsLayout();
   void layout();
   void setLayoutManager(LayoutCallback layout, LayoutCallback computeIntrinsicWidths);
 
   // TODO(abarth): Move to Node.
   readonly attribute CSSStyleDeclaration style;
 
   // TODO(abarth): Remove these when we implement more of the system.
   [RaisesException] boolean matches(DOMString selectors);
   void focus();
@@ skipping 15 matching lines @@
 
   attribute double x;
   attribute double y;
   attribute double width;
   attribute double height;
   attribute double minContentWidth; // Intrinsic width if all wrappable points wrap.
   attribute double maxContentWidth; // Intrinsic width if no wrappable points wrap.
 
   void paint(Canvas canvas);
 };