Rendering API cleanup

Source/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 378 matching lines @@
 
     if (paintBehavior & PaintBehaviorFlattenCompositingLayers) {
         TransformationMatrix matrix = *m_transform;
         makeMatrixRenderable(matrix, false /* flatten 3d */);
         return matrix;
     }
 
     return *m_transform;
 }
 
-RenderLayer* RenderLayer::enclosingOverflowClipLayer(IncludeSelfOrNot includeSelf) const
-{
-    const RenderLayer* layer = (includeSelf == IncludeSelf) ? this : parent();
-    while (layer) {
-        if (layer->renderer()->hasOverflowClip())
-            return const_cast<RenderLayer*>(layer);
-
-        layer = layer->parent();
-    }
-    return 0;
-}
-
 static bool checkContainingBlockChainForPagination(RenderLayerModelObject* renderer, RenderBox* ancestorColumnsRenderer)
 {
     RenderView* view = renderer->view();
     RenderLayerModelObject* prevBlock = renderer;
     RenderBlock* containingBlock;
     for (containingBlock = renderer->containingBlock();
          containingBlock && containingBlock != view && containingBlock != ancestorColumnsRenderer;
          containingBlock = containingBlock->containingBlock())
         prevBlock = containingBlock;
 
@@ skipping 3012 matching lines @@
 }
 
 bool RenderLayer::hasVisibleBoxDecorations() const
 {
     if (!hasVisibleContent())
         return false;
 
     return hasBoxDecorationsOrBackground() || hasOverflowControls();
 }
 
-bool RenderLayer::isVisuallyNonEmpty() const
-{
-    ASSERT(!m_visibleDescendantStatusDirty);
-
-    if (hasVisibleContent() && hasNonEmptyChildRenderers())
-        return true;
-
-    if (renderer()->isReplaced() || renderer()->hasMask())
-        return true;
-
-    if (hasVisibleBoxDecorations())
-        return true;
-
-    return false;
-}
-
 void RenderLayer::updateFilters(const RenderStyle* oldStyle, const RenderStyle* newStyle)
 {
     if (!newStyle->hasFilter() && (!oldStyle || !oldStyle->hasFilter()))
         return;
 
     updateOrRemoveFilterClients();
     updateOrRemoveFilterEffectRenderer();
 }
 
 bool RenderLayer::attemptDirectCompositingUpdate(StyleDifference diff, const RenderStyle* oldStyle)
@@ skipping 233 matching lines @@
     }
 }
 
 void showLayerTree(const blink::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif