Revert 98735 - Source/WebCore: The HTML5 video element in Safari does not respect "visibility:hid...

Source/WebCore/platform/graphics/ca/GraphicsLayerCA.h

Index: Source/WebCore/platform/graphics/ca/GraphicsLayerCA.h
===================================================================
--- Source/WebCore/platform/graphics/ca/GraphicsLayerCA.h	(revision 104364)
+++ Source/WebCore/platform/graphics/ca/GraphicsLayerCA.h	(working copy)
@@ -85,7 +85,6 @@
     virtual void setPreserves3D(bool);
     virtual void setMasksToBounds(bool);
     virtual void setDrawsContent(bool);
-    virtual void setContentsVisible(bool);
     virtual void setAcceleratesDrawing(bool);
 
     virtual void setBackgroundColor(const Color&);
@@ -278,7 +277,6 @@
     void updateTransform();
     void updateChildrenTransform();
     void updateMasksToBounds();
-    void updateContentsVisibility();
     void updateContentsOpaque();
     void updateBackfaceVisibility();
     void updateStructuralLayer(float pixelAlignmentScale, const FloatPoint& positionRelativeToBase);
@@ -324,7 +322,7 @@
         ChildrenTransformChanged = 1 << 5,
         Preserves3DChanged = 1 << 6,
         MasksToBoundsChanged = 1 << 7,
-        DrawsContentChanged = 1 << 8,
+        DrawsContentChanged = 1 << 8, // need this?
         BackgroundColorChanged = 1 << 9,
         ContentsOpaqueChanged = 1 << 10,
         BackfaceVisibilityChanged = 1 << 11,
@@ -339,8 +337,7 @@
         ReplicatedLayerChanged = 1 << 20,
         ContentsNeedsDisplay = 1 << 21,
         AcceleratesDrawingChanged = 1 << 22,
-        ContentsScaleChanged = 1 << 23,
-        ContentsVisibilityChanged = 1 << 24,
+        ContentsScaleChanged = 1 << 23
     };
     typedef unsigned LayerChangeFlags;
     void noteLayerPropertyChanged(LayerChangeFlags flags);