Large canvas does not honor containing div's border radius

Source/core/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  *
  * 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 589 matching lines @@
         PaintLayerTemporaryClipRects = 1 << 2,
         PaintLayerPaintingReflection = 1 << 3,
         PaintLayerPaintingOverlayScrollbars = 1 << 4,
         PaintLayerPaintingCompositingBackgroundPhase = 1 << 5,
         PaintLayerPaintingCompositingForegroundPhase = 1 << 6,
         PaintLayerPaintingCompositingMaskPhase = 1 << 7,
         PaintLayerPaintingCompositingScrollingPhase = 1 << 8,
         PaintLayerPaintingOverflowContents = 1 << 9,
         PaintLayerPaintingRootBackgroundOnly = 1 << 10,
         PaintLayerPaintingSkipRootBackground = 1 << 11,
+        PaintLayerPaintingCompositingBorderRadiusMaskPhase = 1 << 12,
         PaintLayerPaintingCompositingAllPhases = (PaintLayerPaintingCompositingBackgroundPhase | PaintLayerPaintingCompositingForegroundPhase | PaintLayerPaintingCompositingMaskPhase)
     };
     
     typedef unsigned PaintLayerFlags;
 
     // The two main functions that use the layer system.  The paint method
     // paints the layers that intersect the damage rect from back to
     // front.  The hitTest method looks for mouse events by walking
     // layers that intersect the point from front to back.
     void paint(GraphicsContext*, const LayoutRect& damageRect, PaintBehavior = PaintBehaviorNormal, RenderObject* paintingRoot = 0,
@@ skipping 111 matching lines @@
 
     // Overloaded new operator. Derived classes must override operator new
     // in order to allocate out of the RenderArena.
     void* operator new(size_t, RenderArena*);
 
     // Overridden to prevent the normal delete from being called.
     void operator delete(void*, size_t);
 
     bool isComposited() const { return m_backing != 0; }
     bool hasCompositedMask() const;
+    bool hasCompositedBorderRadiusMask() const;
     RenderLayerBacking* backing() const { return m_backing.get(); }
     RenderLayerBacking* ensureBacking();
     void clearBacking(bool layerBeingDestroyed = false);
     virtual GraphicsLayer* layerForScrolling() const;
     virtual GraphicsLayer* layerForHorizontalScrollbar() const;
     virtual GraphicsLayer* layerForVerticalScrollbar() const;
     virtual GraphicsLayer* layerForScrollCorner() const;
     virtual bool usesCompositedScrolling() const OVERRIDE;
     bool needsCompositedScrolling() const;
     bool needsCompositingLayersRebuiltForClip(const RenderStyle* oldStyle, const RenderStyle* newStyle) const;
@@ skipping 205 matching lines @@
         ShouldRespectOverflowClip = RespectOverflowClip, const LayoutPoint* offsetFromRoot = 0, const LayoutRect* layerBoundingBox = 0);
     void updatePaintingInfoForFragments(LayerFragments&, const LayerPaintingInfo&, PaintLayerFlags, bool shouldPaintContent, const LayoutPoint* offsetFromRoot);
     void paintBackgroundForFragments(const LayerFragments&, GraphicsContext*, GraphicsContext* transparencyLayerContext,
         const LayoutRect& transparencyPaintDirtyRect, bool haveTransparency, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer);
     void paintForegroundForFragments(const LayerFragments&, GraphicsContext*, GraphicsContext* transparencyLayerContext,
         const LayoutRect& transparencyPaintDirtyRect, bool haveTransparency, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer,
         bool selectionOnly, bool forceBlackText);
     void paintForegroundForFragmentsWithPhase(PaintPhase, const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer);
     void paintOutlineForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, PaintBehavior, RenderObject* paintingRootForRenderer);
     void paintOverflowControlsForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&);
-    void paintMaskForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, RenderObject* paintingRootForRenderer);
+    void paintMaskForFragments(const LayerFragments&, GraphicsContext*, const LayerPaintingInfo&, RenderObject* paintingRootForRenderer, PaintPhase = PaintPhaseMask);
     void paintTransformedLayerIntoFragments(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
 
     RenderLayer* hitTestLayer(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest& request, HitTestResult& result,
                               const LayoutRect& hitTestRect, const HitTestLocation&, bool appliedTransform,
                               const HitTestingTransformState* transformState = 0, double* zOffset = 0);
     RenderLayer* hitTestLayerByApplyingTransform(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest&, HitTestResult&,
         const LayoutRect& hitTestRect, const HitTestLocation&, const HitTestingTransformState* = 0, double* zOffset = 0,
         const LayoutPoint& translationOffset = LayoutPoint());
     RenderLayer* hitTestList(Vector<RenderLayer*>*, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result,
                              const LayoutRect& hitTestRect, const HitTestLocation&,
@@ skipping 347 matching lines @@
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const WebCore::RenderLayer*);
 void showLayerTree(const WebCore::RenderObject*);
 #endif
 
 #endif // RenderLayer_h