Change LayoutState to be stack-allocated

Source/core/rendering/RenderTableSection.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 624 matching lines @@
 int RenderTableSection::calcRowLogicalHeight()
 {
 #ifndef NDEBUG
     SetLayoutNeededForbiddenScope layoutForbiddenScope(*this);
 #endif
 
     ASSERT(!needsLayout());
 
     RenderTableCell* cell;
 
-    LayoutStateMaintainer statePusher(*this);
+    // FIXME: This shouldn't use the same constructor as RenderView.
+    LayoutState state(*this);
 
     m_rowPos.resize(m_grid.size() + 1);
 
     // We ignore the border-spacing on any non-top section as it is already included in the previous section's last row position.
     if (this == table()->topSection())
         m_rowPos[0] = table()->vBorderSpacing();
     else
         m_rowPos[0] = 0;
 
     SpanningRenderTableCells rowSpanCells;
@@ skipping 32 matching lines @@
 
                         // Find out the baseline. The baseline is set on the first row in a rowSpan.
                         updateBaselineForCell(cell, r, baselineDescent);
                     }
                     continue;
                 }
 
                 ASSERT(cell->rowSpan() == 1);
 
                 if (cell->hasOverrideHeight()) {
-                    if (!statePusher.didPush()) {
-                        // Technically, we should also push state for the row, but since
-                        // rows don't push a coordinate transform, that's not necessary.
-                        statePusher.push(*this, locationOffset());
-                    }
                     cell->clearIntrinsicPadding();
                     cell->clearOverrideSize();
                     cell->forceChildLayout();
                 }
 
                 m_rowPos[r + 1] = max(m_rowPos[r + 1], m_rowPos[r] + cell->logicalHeightForRowSizing());
 
                 // Find out the baseline.
                 updateBaselineForCell(cell, r, baselineDescent);
             }
@@ skipping 15 matching lines @@
 void RenderTableSection::layout()
 {
     ASSERT(needsLayout());
     ASSERT(!needsCellRecalc());
     ASSERT(!table()->needsSectionRecalc());
 
     // addChild may over-grow m_grid but we don't want to throw away the memory too early as addChild
     // can be called in a loop (e.g during parsing). Doing it now ensures we have a stable-enough structure.
     m_grid.shrinkToFit();
 
-    LayoutStateMaintainer statePusher(*this, locationOffset());
+    LayoutState state(*this, locationOffset());
 
     const Vector<int>& columnPos = table()->columnPositions();
 
     SubtreeLayoutScope layouter(*this);
     for (unsigned r = 0; r < m_grid.size(); ++r) {
         Row& row = m_grid[r].row;
         unsigned cols = row.size();
         // First, propagate our table layout's information to the cells. This will mark the row as needing layout
         // if there was a column logical width change.
         for (unsigned startColumn = 0; startColumn < cols; ++startColumn) {
@@ skipping 136 matching lines @@
 
     // Set the width of our section now.  The rows will also be this width.
     setLogicalWidth(table()->contentLogicalWidth());
     m_overflow.clear();
     m_overflowingCells.clear();
     m_forceSlowPaintPathWithOverflowingCell = false;
 
     int vspacing = table()->vBorderSpacing();
     unsigned nEffCols = table()->numEffCols();
 
-    LayoutStateMaintainer statePusher(*this, locationOffset());
+    LayoutState state(*this, locationOffset());
 
     for (unsigned r = 0; r < totalRows; r++) {
         // Set the row's x/y position and width/height.
         if (RenderTableRow* rowRenderer = m_grid[r].rowRenderer) {
             rowRenderer->setLocation(LayoutPoint(0, m_rowPos[r]));
             rowRenderer->setLogicalWidth(logicalWidth());
             rowRenderer->setLogicalHeight(m_rowPos[r + 1] - m_rowPos[r] - vspacing);
             rowRenderer->updateLayerTransform();
             rowRenderer->clearAllOverflows();
             rowRenderer->addVisualEffectOverflow();
@@ skipping 817 matching lines @@
     else
         cellLocation.setX(table()->columnPositions()[effectiveColumn] + horizontalBorderSpacing);
 
     cell->setLogicalLocation(cellLocation);
 
     if (!RuntimeEnabledFeatures::repaintAfterLayoutEnabled())
         view()->addLayoutDelta(oldCellLocation - cell->location());
 }
 
 } // namespace WebCore