Remove optimization to lazily allocate transparency layers in LayerPainter.

Source/core/rendering/RenderLayer.cpp

Index: Source/core/rendering/RenderLayer.cpp
diff --git a/Source/core/rendering/RenderLayer.cpp b/Source/core/rendering/RenderLayer.cpp
index c21315adf2d10b0f3f59f698def68485a3e13a5e..ed04469141028179c64deffb8eda936dfc6d6913 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -1075,20 +1075,6 @@ bool RenderLayer::hasAncestorWithFilterOutsets() const
     return false;
 }
 
-RenderLayer* RenderLayer::transparentPaintingAncestor()
-{
-    if (hasCompositedLayerMapping())
-        return 0;
-
-    for (RenderLayer* curr = parent(); curr; curr = curr->parent()) {
-        if (curr->hasCompositedLayerMapping())
-            return 0;
-        if (curr->isTransparent())
-            return curr;
-    }
-    return 0;
-}
-
 static void expandClipRectForDescendantsAndReflection(LayoutRect& clipRect, const RenderLayer* layer, const RenderLayer* rootLayer,
     RenderLayer::TransparencyClipBoxBehavior transparencyBehavior, const LayoutSize& subPixelAccumulation, PaintBehavior paintBehavior)
 {