Fix painting background for composited table cells in a non-composited row.

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

Index: third_party/WebKit/Source/core/paint/TablePaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/TablePaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/TablePaintInvalidator.cpp
index 83b770615fdf4e52e4ad12b30e70ad62e6f4f394..f07b494bf932df898e83b9dc99d11a742f397029 100644
--- a/third_party/WebKit/Source/core/paint/TablePaintInvalidator.cpp
+++ b/third_party/WebKit/Source/core/paint/TablePaintInvalidator.cpp
@@ -60,9 +60,11 @@ PaintInvalidationReason TablePaintInvalidator::invalidatePaintIfNeeded() {
         // instead of its own (if any), so we must invalidate it by the
         // containers.
         if (section->backgroundChangedSinceLastPaintInvalidation()) {
+          cell->ensureIsReadyForPaintInvalidation();

[Xianzhu, 2016/11/16 21:54:32]

Nit: can this be put at the beginning of the 'for' loop body?

[wkorman, 2016/11/16 22:07:42]

Done.

           sectionInvalidator
               .slowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(
-                  *cell, PaintInvalidationStyleChange);
+                  cell->backgroundDisplayItemClient(),
+                  PaintInvalidationStyleChange);
           invalidated = true;
         } else if (hasColChangedBackground) {
           LayoutTable::ColAndColGroup colAndColGroup =
@@ -73,17 +75,22 @@ PaintInvalidationReason TablePaintInvalidator::invalidatePaintIfNeeded() {
                columnGroup->backgroundChangedSinceLastPaintInvalidation()) ||
               (column &&
                column->backgroundChangedSinceLastPaintInvalidation())) {
+            cell->ensureIsReadyForPaintInvalidation();
             sectionInvalidator
                 .slowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(
-                    *cell, PaintInvalidationStyleChange);
+                    cell->backgroundDisplayItemClient(),
+                    PaintInvalidationStyleChange);
             invalidated = true;
           }
         }
         if ((!invalidated || row->hasSelfPaintingLayer()) &&
-            row->backgroundChangedSinceLastPaintInvalidation())
+            row->backgroundChangedSinceLastPaintInvalidation()) {
+          cell->ensureIsReadyForPaintInvalidation();
           ObjectPaintInvalidator(*row)
               .slowSetPaintingLayerNeedsRepaintAndInvalidateDisplayItemClient(
-                  *cell, PaintInvalidationStyleChange);
+                  cell->backgroundDisplayItemClient(),
+                  PaintInvalidationStyleChange);
+        }
       }
     }
   }