WebKit merge 40722:40785 (part 1)

third_party/WebKit/WebCore/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003 Apple Computer, Inc.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 283 matching lines @@
 
     void updateScrollInfoAfterLayout();
 
     bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1.0f);
     void autoscroll();
 
     void resize(const PlatformMouseEvent&, const IntSize&);
     bool inResizeMode() const { return m_inResizeMode; }
     void setInResizeMode(bool b) { m_inResizeMode = b; }
 
+    // Can't just check !parent() because we might be unrooted.
+    bool isRootLayer() const { return renderer()->node()->isDocumentNode(); }
+    
 #if USE(ACCELERATED_COMPOSITING)
     RenderLayerCompositor* compositor() const;
 #endif
     
     void updateLayerPosition();
     void updateLayerPositions(bool doFullRepaint = false, bool checkForRepaint = true);
 
     void updateTransform();
 
     void relativePositionOffset(int& relX, int& relY) const { relX += m_relX; relY += m_relY; }
@@ skipping 263 matching lines @@
     RenderScrollbarPart* m_resizer;
 
 #if USE(ACCELERATED_COMPOSITING)
     OwnPtr<RenderLayerBacking> m_backing;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // RenderLayer_h