Allow assertions to be enabled in Blink Release builds.

Source/core/rendering/RenderBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2286 matching lines @@
                     // Special-case zero- and less-than-zero-height floats: those don't touch
                     // the line that they're on, but it still needs to be dirtied. This is
                     // accomplished by pretending they have a height of 1.
                     logicalBottom = std::max(logicalBottom, logicalTop + 1);
                 }
                 if (floatingObject->originatingLine()) {
                     if (!selfNeedsLayout()) {
                         ASSERT(floatingObject->originatingLine()->renderer() == this);
                         floatingObject->originatingLine()->markDirty();
                     }
-#if ASSERT_ENABLED
+#if ENABLE(ASSERT)
                     floatingObject->setOriginatingLine(0);
 #endif
                 }
                 markLinesDirtyInBlockRange(0, logicalBottom);
             }
             m_floatingObjects->remove(floatingObject);
         }
     }
 }
 
@@ skipping 581 matching lines @@
 RenderBlockFlow::RenderBlockFlowRareData& RenderBlockFlow::ensureRareData()
 {
     if (m_rareData)
         return *m_rareData;
 
     m_rareData = adoptPtr(new RenderBlockFlowRareData(this));
     return *m_rareData;
 }
 
 } // namespace WebCore