Attach a WebLayer to a frame element for out-of-process iframes.

Source/core/html/HTMLFrameOwnerElement.h

 /*
  * Copyright (C) 2006, 2007, 2009 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef HTMLFrameOwnerElement_h
 #define HTMLFrameOwnerElement_h
 
 #include "core/html/HTMLElement.h"
 #include "wtf/HashCountedSet.h"
 
+namespace blink {
+class WebLayer;
+}
+
 namespace WebCore {
 
 class DOMWindow;
 class ExceptionState;
 class Frame;
 class RenderPart;
 class SVGDocument;
 
 class HTMLFrameOwnerElement : public HTMLElement {
 public:
@@ skipping 19 matching lines @@
 
     SandboxFlags sandboxFlags() const { return m_sandboxFlags; }
 
     virtual bool loadedNonEmptyDocument() const { return false; }
     virtual void didLoadNonEmptyDocument() { }
 
     virtual void renderFallbackContent() { }
 
     virtual bool isObjectElement() const { return false; }
 
+    void setPlatformLayer(blink::WebLayer* platformLayer) { m_platformLayer = platformLayer; }
+    blink::WebLayer* platformLayer() const { return m_platformLayer; }
+
 protected:
     HTMLFrameOwnerElement(const QualifiedName& tagName, Document&);
     void setSandboxFlags(SandboxFlags);
 
     bool loadOrRedirectSubframe(const KURL&, const AtomicString& frameName, bool lockBackForwardList);
 
 private:
     virtual bool isKeyboardFocusable() const OVERRIDE;
     virtual bool isFrameOwnerElement() const OVERRIDE { return true; }
 
     Frame* m_contentFrame;
     SandboxFlags m_sandboxFlags;
+
+    // This layer is for frames whose contents are being renderered in a separate process.
+    blink::WebLayer* m_platformLayer;
 };
 
 DEFINE_NODE_TYPE_CASTS(HTMLFrameOwnerElement, isFrameOwnerElement());
 
 class SubframeLoadingDisabler {
 public:
     explicit SubframeLoadingDisabler(Node& root)
         : m_root(root)
     {
         disabledSubtreeRoots().add(&m_root);
@@ skipping 19 matching lines @@
         DEFINE_STATIC_LOCAL(HashCountedSet<Node*>, nodes, ());
         return nodes;
     }
 
     Node& m_root;
 };
 
 } // namespace WebCore
 
 #endif // HTMLFrameOwnerElement_h