Revert NotImplemented() changes in r383029 and r383047.

third_party/WebKit/Source/core/layout/TableLayoutAlgorithmAuto.cpp

 /*
  * Copyright (C) 2002 Lars Knoll (knoll@kde.org)
  *           (C) 2002 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2008, 2010 Apple Inc. All rights reserved.
  *
  * 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
  * version 2 of the License.
  *
@@ skipping 455 matching lines @@
     m_effectiveLogicalWidthDirty = false;
 
     return std::min(maxLogicalWidth, INT_MAX / 2);
 }
 
 /* gets all cells that originate in a column and have a cellspan > 1
    Sorts them by increasing cellspan
 */
 void TableLayoutAlgorithmAuto::insertSpanCell(LayoutTableCell *cell)
 {
-    DCHECK(cell);
-    DCHECK_NE(cell->colSpan(), 1u);
+    ASSERT_ARG(cell, cell && cell->colSpan() != 1);
     if (!cell || cell->colSpan() == 1)
         return;
 
     unsigned size = m_spanCells.size();
     if (!size || m_spanCells[size-1] != 0) {
         m_spanCells.grow(size + 10);
         for (unsigned i = 0; i < 10; i++)
             m_spanCells[size+i] = 0;
         size += 10;
     }
@@ skipping 207 matching lines @@
             int reduce = available * minMaxDiff / logicalWidthBeyondMin;
             m_layoutStruct[i].computedLogicalWidth += reduce;
             available -= reduce;
             logicalWidthBeyondMin -= minMaxDiff;
             if (available >= 0)
                 break;
         }
     }
 }
 } // namespace blink