[M54] Freeze auto scrollbars while calculating table row height.

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

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 14 matching lines @@
 
 #include "core/layout/LayoutTableSection.h"
 
 #include "core/layout/HitTestResult.h"
 #include "core/layout/LayoutAnalyzer.h"
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutTableCol.h"
 #include "core/layout/LayoutTableRow.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/SubtreeLayoutScope.h"
+#include "core/paint/PaintLayerScrollableArea.h"
 #include "core/paint/TableSectionPainter.h"
 #include "wtf/HashSet.h"
 #include <algorithm>
 #include <limits>
 
 namespace blink {
 
 using namespace HTMLNames;
 
 // This variable is used to balance the memory consumption vs the paint invalidation time on big tables.
@@ skipping 730 matching lines @@
                         ASSERT(!uniqueCells.contains(cell));
                         uniqueCells.add(cell);
 #endif
 
                         rowSpanCells.append(cell);
                         lastRowSpanCell = cell;
                     }
                 }
 
                 if (cell->rowIndex() == r && cell->hasOverrideLogicalContentHeight()) {
+                    PaintLayerScrollableArea::FreezeScrollbarsScope freezeScrollbars;
                     cell->clearIntrinsicPadding();
                     cell->clearOverrideSize();
                     cell->forceChildLayout();
                 }
 
                 if (cell->rowSpan() == 1)
                     m_rowPos[r + 1] = std::max(m_rowPos[r + 1], m_rowPos[r] + cell->logicalHeightForRowSizing());
 
                 // Find out the baseline. The baseline is set on the first row in a rowSpan.
                 if (cell->rowIndex() == r)
@@ skipping 951 matching lines @@
     // Repeating table headers are painted once per fragmentation page/column. This does not go through the regular fragmentation machinery,
     // so we need special code to expand the invalidation rect to contain all positions of the header in all columns.
     // Note that this is in flow thread coordinates, not visual coordinates. The enclosing LayoutFlowThread will convert to visual coordinates.
     if (table()->header() == this && hasRepeatingHeaderGroup())
         rect.setHeight(table()->logicalHeight());
     return LayoutTableBoxComponent::mapToVisualRectInAncestorSpace(ancestor, rect, flags);
 }
 
 
 } // namespace blink