Allow assertions to be enabled in Blink Release builds.

Source/core/rendering/svg/SVGRenderingContext.cpp

 /*
  * Copyright (C) 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 72 matching lines @@
         m_paintInfo->context->endLayer();
 
     if (m_renderingFlags & RestoreGraphicsContext)
         m_paintInfo->context->restore();
 }
 
 void SVGRenderingContext::prepareToRenderSVGContent(RenderObject* object, PaintInfo& paintInfo, NeedsGraphicsContextSave needsGraphicsContextSave)
 {
     ASSERT(object);
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     // This function must not be called twice!
     ASSERT(!(m_renderingFlags & PrepareToRenderSVGContentWasCalled));
     m_renderingFlags |= PrepareToRenderSVGContentWasCalled;
 #endif
 
     m_object = object;
     m_paintInfo = &paintInfo;
     m_filter = 0;
 
     // We need to save / restore the context even if the initialization failed.
@@ skipping 198 matching lines @@
             toRenderSVGImage(m_object)->paintForeground(bufferedInfo);
         } else
             return false;
     }
 
     m_paintInfo->context->drawImageBuffer(imageBuffer.get(), boundingBox);
     return true;
 }
 
 }