Blink CompositorWorker: Use CompositorElementId and CompositorIdToElementMap.

third_party/WebKit/Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003-2011, 2013, 2014 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 19 matching lines @@
 #include "core/HTMLNames.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSSelector.h"
 #include "core/dom/AXObjectCache.h"
 #include "core/dom/Attribute.h"
 #include "core/dom/ContainerNode.h"
 #include "core/dom/Document.h"
 #include "core/dom/ElementData.h"
 #include "core/dom/SpaceSplitString.h"
 #include "core/html/CollectionType.h"
+#include "platform/graphics/CompositorElementId.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebFocusType.h"
 
 namespace blink {
 
 class ElementAnimations;
 class Attr;
 class Attribute;
 class CSSStyleDeclaration;
 class ClientRect;
@@ skipping 481 matching lines @@
     bool hasClass() const;
     const SpaceSplitString& classNames() const;
 
     IntSize savedLayerScrollOffset() const;
     void setSavedLayerScrollOffset(const IntSize&);
 
     ElementAnimations* elementAnimations() const;
     ElementAnimations& ensureElementAnimations();
     bool hasAnimations() const;
 
+    CompositorElementId compositorElementId() const;
+    CompositorElementId assignCompositorElementId();
+
     void synchronizeAttribute(const AtomicString& localName) const;
 
     MutableStylePropertySet& ensureMutableInlineStyle();
     void clearMutableInlineStyleIfEmpty();
 
     void setTabIndex(int);
     short tabIndex() const override;
 
     // A compositor proxy is a very limited wrapper around an element. It
     // exposes only those properties that are requested at the time the proxy is
@@ skipping 410 matching lines @@
     static T* create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     T* T::create(const QualifiedName& tagName, Document& document) \
     { \
         return new T(tagName, document); \
     }
 
 } // namespace blink
 
 #endif // Element_h