Spec-compliant parsing and initial values for 'orphans' and 'widows'.

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 800 matching lines @@
         if (lineLogicalOffset > block.borderAndPaddingBefore())
             return false;
 
         LayoutUnit lineHeight = lineBox.lineBottomWithLeading() - lineBox.lineTopWithLeading();
         LayoutUnit totalLogicalHeight = lineHeight + lineLogicalOffset.clampNegativeToZero();
         // It's rather pointless to break before the block if the current line isn't going to
         // fit in the same column or page, so check that as well.
         if (totalLogicalHeight > pageLogicalHeight)
             return false;
     } else {
-        if (block.style()->hasAutoOrphans() || lineIndex > block.style()->orphans())
+        if (lineIndex > block.style()->orphans())
             return false;
 
         // Not enough orphans here. Push the entire block to the next column / page as an attempt to
         // better satisfy the orphans requirement.
         //
         // Note that we should ideally check if the first line in the block is flush with the
         // content edge of the block here, because if it isn't, we should break at the class "C"
         // break point in front of the first line, rather than before the entire block.
     }
     return block.allowsPaginationStrut();
@@ skipping 2208 matching lines @@
     // FIXME: Glyph overflow will get lost in this case, but not really a big deal.
     GlyphOverflowAndFallbackFontsMap textBoxDataMap;
     for (ListHashSet<RootInlineBox*>::const_iterator it = lineBoxes.begin(); it != lineBoxes.end(); ++it) {
         RootInlineBox* box = *it;
         box->computeOverflow(box->lineTop(), box->lineBottom(), textBoxDataMap);
     }
     return childrenOverflowChanged;
 }
 
 } // namespace blink