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

Source/WebCore/platform/graphics/GraphicsLayer.cpp

Index: Source/WebCore/platform/graphics/GraphicsLayer.cpp
===================================================================
--- Source/WebCore/platform/graphics/GraphicsLayer.cpp	(revision 104364)
+++ Source/WebCore/platform/graphics/GraphicsLayer.cpp	(working copy)
@@ -77,7 +77,6 @@
     , m_usingTiledLayer(false)
     , m_masksToBounds(false)
     , m_drawsContent(false)
-    , m_contentsVisible(true)
     , m_acceleratesDrawing(false)
     , m_maintainsPixelAlignment(false)
     , m_appliesPageScale(false)
@@ -505,11 +504,6 @@
         ts << "(drawsContent " << m_drawsContent << ")\n";
     }
 
-    if (!m_contentsVisible) {
-        writeIndent(ts, indent + 1);
-        ts << "(contentsVisible " << m_contentsVisible << ")\n";
-    }
-
     if (!m_backfaceVisibility) {
         writeIndent(ts, indent + 1);
         ts << "(backfaceVisibility " << (m_backfaceVisibility ? "visible" : "hidden") << ")\n";