Begin tracking why layout is invalidated

Source/core/layout/LayoutTableCell.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, 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
@@ skipping 84 matching lines @@
     m_hasRowSpan = node() && parseRowSpanFromDOM() != 1;
 }
 
 void LayoutTableCell::colSpanOrRowSpanChanged()
 {
     ASSERT(node());
     ASSERT(isHTMLTableCellElement(*node()));
 
     updateColAndRowSpanFlags();
 
-    setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
+    setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::AttributeChanged);
     if (parent() && section())
         section()->setNeedsCellRecalc();
 }
 
 Length LayoutTableCell::logicalWidthFromColumns(LayoutTableCol* firstColForThisCell, Length widthFromStyle) const
 {
     ASSERT(firstColForThisCell && firstColForThisCell == table()->colElement(col()));
     LayoutTableCol* tableCol = firstColForThisCell;
 
     unsigned colSpanCount = colSpan();
@@ skipping 87 matching lines @@
         break;
     }
 
     int intrinsicPaddingAfter = rowHeight - logicalHeightWithoutIntrinsicPadding - intrinsicPaddingBefore;
     setIntrinsicPaddingBefore(intrinsicPaddingBefore);
     setIntrinsicPaddingAfter(intrinsicPaddingAfter);
 
     // FIXME: Changing an intrinsic padding shouldn't trigger a relayout as it only shifts the cell inside the row but
     // doesn't change the logical height.
     if (intrinsicPaddingBefore != oldIntrinsicPaddingBefore || intrinsicPaddingAfter != oldIntrinsicPaddingAfter)
-        layouter.setNeedsLayout(this);
+        layouter.setNeedsLayout(this, LayoutInvalidationReason::PaddingChanged);
 }
 
 void LayoutTableCell::updateLogicalWidth()
 {
 }
 
 void LayoutTableCell::setCellLogicalWidth(int tableLayoutLogicalWidth, SubtreeLayoutScope& layouter)
 {
     if (tableLayoutLogicalWidth == logicalWidth())
         return;
 
-    layouter.setNeedsLayout(this);
+    layouter.setNeedsLayout(this, LayoutInvalidationReason::SizeChanged);
 
     setLogicalWidth(tableLayoutLogicalWidth);
     setCellWidthChanged(true);
 }
 
 void LayoutTableCell::layout()
 {
     ASSERT(needsLayout());
     LayoutAnalyzer::Scope analyzer(*this);
 
     int oldCellBaseline = cellBaselinePosition();
     layoutBlock(cellWidthChanged());
 
     // If we have replaced content, the intrinsic height of our content may have changed since the last time we laid out. If that's the case the intrinsic padding we used
     // for layout (the padding required to push the contents of the cell down to the row's baseline) is included in our new height and baseline and makes both
     // of them wrong. So if our content's intrinsic height has changed push the new content up into the intrinsic padding and relayout so that the rest of
     // table and row layout can use the correct baseline and height for this cell.
     if (isBaselineAligned() && section()->rowBaseline(rowIndex()) && cellBaselinePosition() > section()->rowBaseline(rowIndex())) {
         int newIntrinsicPaddingBefore = std::max<LayoutUnit>(0, intrinsicPaddingBefore() - std::max<LayoutUnit>(0, cellBaselinePosition() - oldCellBaseline));
         setIntrinsicPaddingBefore(newIntrinsicPaddingBefore);
         SubtreeLayoutScope layouter(*this);
-        layouter.setNeedsLayout(this);
+        layouter.setNeedsLayout(this, LayoutInvalidationReason::TableChanged);
         layoutBlock(cellWidthChanged());
     }
 
     // FIXME: This value isn't the intrinsic content logical height, but we need
     // to update the value as its used by flexbox layout. crbug.com/367324
     setIntrinsicContentLogicalHeight(contentLogicalHeight());
 
     setCellWidthChanged(false);
 }
 
@@ skipping 792 matching lines @@
 
 LayoutTableCell* LayoutTableCell::createAnonymousWithParentRenderer(const LayoutObject* parent)
 {
     LayoutTableCell* newCell = LayoutTableCell::createAnonymous(&parent->document());
     RefPtr<ComputedStyle> newStyle = ComputedStyle::createAnonymousStyleWithDisplay(parent->styleRef(), TABLE_CELL);
     newCell->setStyle(newStyle.release());
     return newCell;
 }
 
 } // namespace blink