Remove some dead filters related code.

sky/engine/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 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 371 matching lines @@
 
 const RenderLayer* RenderLayer::compositingContainer() const
 {
     if (stackingNode()->isNormalFlowOnly())
         return parent();
     if (RenderLayerStackingNode* ancestorStackingNode = stackingNode()->ancestorStackingContextNode())
         return ancestorStackingNode->layer();
     return 0;
 }
 
-RenderLayer* RenderLayer::enclosingFilterLayer(IncludeSelfOrNot includeSelf) const
-{
-    const RenderLayer* curr = (includeSelf == IncludeSelf) ? this : parent();
-    for (; curr; curr = curr->parent()) {
-        if (curr->requiresFullLayerImageForFilters())
-            return const_cast<RenderLayer*>(curr);
-    }
-
-    return 0;
-}
-
-bool RenderLayer::hasAncestorWithFilterOutsets() const
-{
-    for (const RenderLayer* curr = this; curr; curr = curr->parent()) {
-        RenderBox* renderer = curr->renderer();
-        if (renderer->style()->hasFilterOutsets())
-            return true;
-    }
-    return false;
-}
-
 enum TransparencyClipBoxBehavior {
     PaintingTransparencyClipBox,
     HitTestingTransparencyClipBox
 };
 
 static LayoutRect transparencyClipBox(const RenderLayer*, const RenderLayer* rootLayer, const LayoutSize& subPixelAccumulation);
 
 static void expandClipRectForDescendantsAndReflection(LayoutRect& clipRect, const RenderLayer* layer, const RenderLayer* rootLayer,
     const LayoutSize& subPixelAccumulation)
 {
@@ skipping 563 matching lines @@
     }
 }
 
 void showLayerTree(const blink::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif