Always relayout children of LayoutView when printing.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 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, or (at your option) any later version.
  *
@@ skipping 803 matching lines @@
   LayoutBlock* block = ContainingBlock();
   if (block)
     block->AdjustChildDebugRect(rect);
 
   rect.SetWidth(LayoutUnit(ViewWidth(kIncludeScrollbars)));
   rect.SetHeight(LayoutUnit(ViewHeight(kIncludeScrollbars)));
 
   return rect;
 }
 
+bool LayoutView::UpdateLogicalWidthAndColumnWidth() {
+  bool relayout_children = LayoutBlockFlow::UpdateLogicalWidthAndColumnWidth();
+  // When we're printing, the size of LayoutView is changed outside of layout,
+  // so we'll fail to detect any changes here. Just return true.
+  return relayout_children || ShouldUsePrintingLayout();
+}
+
 bool LayoutView::PaintedOutputOfObjectHasNoEffectRegardlessOfSize() const {
   // Frame scroll corner is painted using LayoutView as the display item client.
   if (!RuntimeEnabledFeatures::rootLayerScrollingEnabled() &&
       (GetFrameView()->HorizontalScrollbar() ||
        GetFrameView()->VerticalScrollbar()))
     return false;
 
   return LayoutBlockFlow::PaintedOutputOfObjectHasNoEffectRegardlessOfSize();
 }
 
 }  // namespace blink