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

Source/WebCore/platform/graphics/GraphicsLayer.h

Index: Source/WebCore/platform/graphics/GraphicsLayer.h
===================================================================
--- Source/WebCore/platform/graphics/GraphicsLayer.h	(revision 104364)
+++ Source/WebCore/platform/graphics/GraphicsLayer.h	(working copy)
@@ -271,9 +271,6 @@
     bool drawsContent() const { return m_drawsContent; }
     virtual void setDrawsContent(bool b) { m_drawsContent = b; }
 
-    bool contentsAreVisible() const { return m_contentsVisible; }
-    virtual void setContentsVisible(bool b) { m_contentsVisible = b; }
-
     bool acceleratesDrawing() const { return m_acceleratesDrawing; }
     virtual void setAcceleratesDrawing(bool b) { m_acceleratesDrawing = b; }
 
@@ -434,7 +431,6 @@
     bool m_usingTiledLayer : 1;
     bool m_masksToBounds : 1;
     bool m_drawsContent : 1;
-    bool m_contentsVisible : 1;
     bool m_acceleratesDrawing : 1;
     bool m_maintainsPixelAlignment : 1;
     bool m_appliesPageScale : 1; // Set for the layer which has the page scale applied to it.