Allow assertions to be enabled in Blink Release builds.

Source/core/html/canvas/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 97 matching lines @@
         }
     }
 }
 
 CanvasRenderingContext2D::~CanvasRenderingContext2D()
 {
 }
 
 void CanvasRenderingContext2D::validateStateStack()
 {
-#if ASSERT_ENABLED
+#if ENABLE(ASSERT)
     GraphicsContext* context = canvas()->existingDrawingContext();
     if (context && !context->contextDisabled())
         ASSERT(context->saveCount() == m_stateStack.size());
 #endif
 }
 
 bool CanvasRenderingContext2D::isAccelerated() const
 {
     if (!canvas()->hasImageBuffer())
         return false;
@@ skipping 2317 matching lines @@
 
 unsigned CanvasRenderingContext2D::hitRegionsCount() const
 {
     if (m_hitRegionManager)
         return m_hitRegionManager->getHitRegionsCount();
 
     return 0;
 }
 
 } // namespace WebCore