Do not expose auto as value of widows

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 765 matching lines @@
     setLogicalHeight(logicalHeight() + (result - oldTop));
 
     // Return the final adjusted logical top.
     return result;
 }
 
 static inline LayoutUnit calculateMinimumPageHeight(RenderStyle* renderStyle, RootInlineBox* lastLine, LayoutUnit lineTop, LayoutUnit lineBottom)
 {
     // We may require a certain minimum number of lines per page in order to satisfy
     // orphans and widows, and that may affect the minimum page height.
-    unsigned lineCount = std::max<unsigned>(renderStyle->hasAutoOrphans() ? 1 : renderStyle->orphans(), renderStyle->hasAutoWidows() ? 1 : renderStyle->widows());
+    unsigned lineCount = std::max<unsigned>(renderStyle->hasAutoOrphans() ? 1 : renderStyle->orphans(), renderStyle->widows());
     if (lineCount > 1) {
         RootInlineBox* line = lastLine;
         for (unsigned i = 1; i < lineCount && line->prevRootBox(); i++)
             line = line->prevRootBox();
 
         // FIXME: Paginating using line overflow isn't all fine. See FIXME in
         // adjustLinePositionForPagination() for more details.
         LayoutRect overflow = line->logicalVisualOverflowRect(line->lineTop(), line->lineBottom());
         lineTop = std::min(line->lineTopWithLeading(), overflow.y());
     }
@@ skipping 2324 matching lines @@
     FrameView* frameView = document().view();
     LayoutUnit top = (style()->position() == FixedPosition) ? 0 : frameView->scrollOffset().height();
     int visibleHeight = frameView->visibleContentRect(IncludeScrollbars).height();
     if (size().height() < visibleHeight)
         top += (visibleHeight - size().height()) / 2;
     setY(top);
     dialog->setCentered(top);
 }
 
 } // namespace blink