Fix bug of animated table col/section/row background

third_party/WebKit/Source/core/paint/TablePaintInvalidator.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/paint/TablePaintInvalidator.h"
 
 #include "core/layout/LayoutTable.h"
 #include "core/layout/LayoutTableCell.h"
 #include "core/layout/LayoutTableCol.h"
 #include "core/layout/LayoutTableRow.h"
@@ skipping 10 matching lines @@
   // Table cells paint background from the containing column group, column,
   // section and row.  If background of any of them changed, we need to
   // invalidate all affected cells.  Here use shouldDoFullPaintInvalidation() as
   // a broader condition of background change.
 
   // If any col changed background, we'll check all cells for background
   // changes.
   bool hasColChangedBackground = false;
   for (LayoutTableCol* col = m_table.firstColumn(); col;
        col = col->nextColumn()) {
+    // This ensures that the backgroundChangedSinceLastPaintInvalidation flag
+    // is up-to-date.
+    col->ensureIsReadyForPaintInvalidation();
     if (col->backgroundChangedSinceLastPaintInvalidation()) {
       hasColChangedBackground = true;
       break;
     }
   }
   for (LayoutObject* child = m_table.firstChild(); child;
        child = child->nextSibling()) {
     if (!child->isTableSection())
       continue;
     LayoutTableSection* section = toLayoutTableSection(child);
+    section->ensureIsReadyForPaintInvalidation();
     ObjectPaintInvalidator sectionInvalidator(*section);
     if (!hasColChangedBackground &&
         !section
              ->shouldCheckForPaintInvalidationRegardlessOfPaintInvalidationState())
       continue;
     for (LayoutTableRow* row = section->firstRow(); row; row = row->nextRow()) {
+      row->ensureIsReadyForPaintInvalidation();
       if (!hasColChangedBackground &&
           !section->backgroundChangedSinceLastPaintInvalidation() &&
           !row->backgroundChangedSinceLastPaintInvalidation())
         continue;
       for (LayoutTableCell* cell = row->firstCell(); cell;
            cell = cell->nextCell()) {
         bool invalidated = false;
         // Table cells paint container's background on the container's backing
         // instead of its own (if any), so we must invalidate it by the
         // containers.
@@ skipping 23 matching lines @@
               .slowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(
                   *cell, PaintInvalidationStyleChange);
       }
     }
   }
 
   return reason;
 }
 
 }  // namespace blink