Add an API to report debugName in GraphicsLayer

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 226 matching lines @@
     // we don't need to delete them ourselves.
 
     clearBacking(true);
 
     if (m_scrollCorner)
         m_scrollCorner->destroy();
     if (m_resizer)
         m_resizer->destroy();
 }
 
-#ifndef NDEBUG
 String RenderLayer::debugName() const
 {
     String name = renderer()->debugName();
     if (!isReflection())
         return name;
     return name + " (reflection)";
 }
-#endif
 
 RenderLayerCompositor* RenderLayer::compositor() const
 {
     if (!renderer()->view())
         return 0;
     return renderer()->view()->compositor();
 }
 
 void RenderLayer::contentChanged(ContentChangeType changeType)
 {
@@ skipping 6131 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif