Reland "Implement FullScreen using top layer."

third_party/WebKit/Source/core/layout/api/LayoutItem.h

 // Copyright 2016 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.
 
 #ifndef LayoutItem_h
 #define LayoutItem_h
 
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/layout/LayoutObject.h"
 
@@ skipping 81 matching lines @@
     bool isEmbeddedObject() const
     {
         return m_layoutObject->isEmbeddedObject();
     }
 
     bool isImage() const
     {
         return m_layoutObject->isImage();
     }
 
-    bool isLayoutFullScreen() const
-    {
-        return m_layoutObject->isLayoutFullScreen();
-    }
-
     bool isListItem() const
     {
         return m_layoutObject->isListItem();
     }
 
     bool isMedia() const
     {
         return m_layoutObject->isMedia();
     }
 
@@ skipping 183 matching lines @@
 
 private:
     LayoutObject* m_layoutObject;
 
     friend class LayoutAPIShim;
 };
 
 } // namespace blink
 
 #endif // LayoutItem_h