Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/core/layout/LayoutBlockFlow.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 3338 matching lines @@
     if (!inlineRunStart)
       break;
 
     child = inlineRunEnd->nextSibling();
 
     LayoutBlock* block = createAnonymousBlock();
     children()->insertChildNode(this, block, inlineRunStart);
     moveChildrenTo(block, inlineRunStart, child);
   }
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
   for (LayoutObject* c = firstChild(); c; c = c->nextSibling())
     ASSERT(!c->isInline());
 #endif
 
   setShouldDoFullPaintInvalidation();
 }
 
 void LayoutBlockFlow::childBecameNonInline(LayoutObject*) {
   makeChildrenNonInline();
   if (isAnonymousBlock() && parent() && parent()->isLayoutBlock())
@@ skipping 199 matching lines @@
           // 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()->getLineLayoutItem().isEqual(
                     this));
             floatingObject.originatingLine()->markDirty();
           }
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
           floatingObject.setOriginatingLine(nullptr);
 #endif
         }
         markLinesDirtyInBlockRange(LayoutUnit(), logicalBottom);
       }
       m_floatingObjects->remove(&floatingObject);
     }
   }
 }
 
@@ skipping 1008 matching lines @@
   return LayoutBlock::invalidatePaintIfNeeded(paintInvalidationState);
 }
 
 void LayoutBlockFlow::invalidateDisplayItemClients(
     PaintInvalidationReason invalidationReason) const {
   BlockFlowPaintInvalidator(*this).invalidateDisplayItemClients(
       invalidationReason);
 }
 
 }  // namespace blink