Replace ASSERT with DCHECK in core/layout/<sub dirs>

third_party/WebKit/Source/core/layout/line/TrailingObjects.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  *               All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2014 Adobe Systems Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 50 matching lines @@
 // updateMidpointsForTrailingObjects() to put them in the right place when we
 // start ignoring surplus whitespace.
 
 class TrailingObjects {
   STACK_ALLOCATED();
 
  public:
   TrailingObjects() : m_whitespace(nullptr) {}
 
   void setTrailingWhitespace(LineLayoutText whitespace) {
-    ASSERT(whitespace);
+    DCHECK(whitespace);
     m_whitespace = whitespace;
   }
 
   void clear() {
     m_whitespace = LineLayoutText();
     // Using resize(0) rather than clear() here saves 2% on
     // PerformanceTests/Layout/line-layout.html because we avoid freeing and
     // re-allocating the underlying buffer repeatedly.
     m_objects.resize(0);
   }
@@ skipping 10 matching lines @@
                                          CollapseFirstSpaceOrNot);
 
  private:
   LineLayoutText m_whitespace;
   Vector<LineLayoutItem, 4> m_objects;
 };
 
 }  // namespace blink
 
 #endif  // TrailingObjects_h