LayoutFlowThread parameter to adjustLinePositionForPagination() is now unused.

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 727 matching lines @@
             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());
     }
     return lineBottom - lineTop;
 }
 
-void LayoutBlockFlow::adjustLinePositionForPagination(RootInlineBox& lineBox, LayoutUnit& delta, LayoutFlowThread* flowThread)
+void LayoutBlockFlow::adjustLinePositionForPagination(RootInlineBox& lineBox, LayoutUnit& delta)
 {
     // FIXME: For now we paginate using line overflow. This ensures that lines don't overlap at all when we
     // put a strut between them for pagination purposes. However, this really isn't the desired layout, since
     // the line on the top of the next page will appear too far down relative to the same kind of line at the top
     // of the first column.
     //
     // The layout we would like to see is one where the lineTopWithLeading is at the top of the column, and any line overflow
     // simply spills out above the top of the column. This effect would match what happens at the top of the first column.
     // We can't achieve this layout, however, until we stop columns from clipping to the column bounds (thus allowing
     // for overflow to occur), and then cache visible overflow for each column rect.
@@ skipping 2307 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