Make ifdefs consistent in WebKit/Source/core/

third_party/WebKit/Source/core/layout/api/LineLayoutBox.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LineLayoutBox_h
 #define LineLayoutBox_h
 
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/LayoutBox.h"
 #include "core/layout/api/LineLayoutBoxModel.h"
@@ skipping 84 matching lines @@
   }
 
   InlineBox* createInlineBox() { return toBox()->createInlineBox(); }
 
   InlineBox* inlineBoxWrapper() const { return toBox()->inlineBoxWrapper(); }
 
   void setInlineBoxWrapper(InlineBox* box) {
     return toBox()->setInlineBoxWrapper(box);
   }
 
-#ifndef NDEBUG
+#if DCHECK_IS_ON()
 
   void showLineTreeAndMark(const InlineBox* markedBox1,
                            const char* markedLabel1) const {
     if (layoutObject()->isLayoutBlockFlow())
       toLayoutBlockFlow(layoutObject())
           ->showLineTreeAndMark(markedBox1, markedLabel1);
   }
 
 #endif
 
  private:
   LayoutBox* toBox() { return toLayoutBox(layoutObject()); }
 
   const LayoutBox* toBox() const { return toLayoutBox(layoutObject()); }
 };
 
 inline LineLayoutBox LineLayoutItem::containingBlock() const {
   return LineLayoutBox(layoutObject()->containingBlock());
 }
 
 }  // namespace blink
 
 #endif  // LineLayoutBox_h