Merge 139461

Source/WebCore/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 708 matching lines @@
 
     Node* enclosingElement() const;
 
 #if ENABLE(DIALOG_ELEMENT)
     bool isInTopLayer() const;
     bool isInTopLayerSubtree() const;
 #endif
 
     virtual void reportMemoryUsage(MemoryObjectInfo*) const OVERRIDE;
 
+#if USE(ACCELERATED_COMPOSITING)
+    enum ViewportConstrainedNotCompositedReason {
+        NoNotCompositedReason,
+        NotCompositedForBoundsOutOfView,
+        NotCompositedForNonViewContainer,
+    };
+
+    void setViewportConstrainedNotCompositedReason(ViewportConstrainedNotCompositedReason reason) { m_viewportConstrainedNotCompositedReason = reason; }
+    ViewportConstrainedNotCompositedReason viewportConstrainedNotCompositedReason() const { return static_cast<ViewportConstrainedNotCompositedReason>(m_viewportConstrainedNotCompositedReason); }
+#endif
+
 private:
     void updateZOrderLists();
     void rebuildZOrderLists();
     void clearZOrderLists();
 
     void updateNormalFlowList();
 
     bool isStackingContext(const RenderStyle* style) const { return !style->hasAutoZIndex() || isRootLayer(); }
     bool isDirtyStackingContext() const { return m_zOrderListsDirty && isStackingContext(); }
 
@@ skipping 289 matching lines @@
     bool m_hasVisibleDescendant : 1;
 
     bool m_isPaginated : 1; // If we think this layer is split by a multi-column ancestor, then this bit will be set.
 
     bool m_3DTransformedDescendantStatusDirty : 1;
     bool m_has3DTransformedDescendant : 1;  // Set on a stacking context layer that has 3D descendants anywhere
                                             // in a preserves3D hierarchy. Hint to do 3D-aware hit testing.
 #if USE(ACCELERATED_COMPOSITING)
     bool m_hasCompositingDescendant : 1; // In the z-order tree.
     unsigned m_indirectCompositingReason : 3;
+    unsigned m_viewportConstrainedNotCompositedReason : 2;
 #endif
 
     bool m_containsDirtyOverlayScrollbars : 1;
     bool m_updatingMarqueePosition : 1;
 
 #if !ASSERT_DISABLED
     bool m_layerListMutationAllowed : 1;
 #endif
     // This is an optimization added for <table>.
     // Currently cells do not need to update their repaint rectangles when scrolling. This also
@@ skipping 122 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