Make it possible to custom-paint without an Element.

sky/engine/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 45 matching lines @@
 #include "sky/engine/wtf/PassRefPtr.h"
 #include "sky/engine/wtf/WeakPtr.h"
 #include "sky/engine/wtf/text/TextEncoding.h"
 #include "sky/engine/wtf/text/TextPosition.h"
 
 namespace blink {
 
 class AbstractModule;
 class AnimationTimeline;
 class Attr;
+class Comment;
+class ConsoleMessage;
 class CSSStyleDeclaration;
 class CSSStyleSheet;
-class Comment;
-class ConsoleMessage;
+class CustomElementRegistry;
 class DocumentFragment;
 class DocumentLifecycleNotifier;
 class DocumentLoadTiming;
 class DocumentMarkerController;
 class DocumentParser;
 class Element;
 class ElementDataCache;
 class Event;
 class EventListener;
 class ExceptionState;
 class FloatQuad;
 class FloatRect;
 class Frame;
 class FrameHost;
 class FrameView;
+class HitTestRequest;
 class HTMLDocumentParser;
 class HTMLElement;
 class HTMLImport;
 class HTMLImportLoader;
 class HTMLImportsController;
 class HTMLScriptElement;
-class HitTestRequest;
 class LayoutPoint;
 class LocalDOMWindow;
 class LocalFrame;
 class Location;
 class MediaQueryListListener;
 class MediaQueryMatcher;
-class CustomElementRegistry;
 class Page;
+class Picture;
 class QualifiedName;
 class Range;
 class RenderView;
 class RequestAnimationFrameCallback;
 class ResourceFetcher;
+class ScriptedAnimationController;
 class ScriptRunner;
-class ScriptedAnimationController;
 class SegmentedString;
 class SelectorQueryCache;
 class Settings;
 class StyleEngine;
 class StyleResolver;
 class Text;
 
 struct AnnotatedRegionValue;
 
 typedef int ExceptionCode;
@@ skipping 370 matching lines @@
     void maybeHandleHttpRefresh(const String&, HttpRefreshType);
 
     PassOwnPtr<LifecycleNotifier<Document> > createLifecycleNotifier();
 
     void setHasViewportUnits() { m_hasViewportUnits = true; }
     bool hasViewportUnits() const { return m_hasViewportUnits; }
     void notifyResizeForViewportUnits();
 
     void didRecalculateStyleForElement() { ++m_styleRecalcElementCounter; }
 
+    Picture* rootPicture() const;
+    void setRootPicture(PassRefPtr<Picture> picture);
+
 protected:
     explicit Document(const DocumentInit&);
 
 #if !ENABLE(OILPAN)
     virtual void dispose() override;
 #endif
 
     PassRefPtr<Document> cloneDocumentWithoutChildren();
 
     bool importContainerNodeChildren(ContainerNode* oldContainerNode, PassRefPtr<ContainerNode> newContainerNode, ExceptionState&);
@@ skipping 164 matching lines @@
     RefPtr<Document> m_templateDocument;
     // With Oilpan the templateDocument and the templateDocumentHost
     // live and die together. Without Oilpan, the templateDocumentHost
     // is a manually managed backpointer from m_templateDocument.
     RawPtr<Document> m_templateDocumentHost;
 
     bool m_hasViewportUnits;
 
     int m_styleRecalcElementCounter;
     mutable DocumentLoadTiming m_documentLoadTiming;
+
+    RefPtr<Picture> m_picture;
 };
 
 inline void Document::scheduleRenderTreeUpdateIfNeeded()
 {
     // Inline early out to avoid the function calls below.
     if (hasPendingStyleRecalc())
         return;
     if (shouldScheduleRenderTreeUpdate() && needsRenderTreeUpdate())
         scheduleRenderTreeUpdate();
 }
@@ skipping 16 matching lines @@
 }
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLiveDocumentInstances();
 #endif
 
 #endif  // SKY_ENGINE_CORE_DOM_DOCUMENT_H_