Mark when we may have been invalidated to early out on repaintTreeAfterLayout.

Source/core/rendering/RenderGrid.cpp

Index: Source/core/rendering/RenderGrid.cpp
diff --git a/Source/core/rendering/RenderGrid.cpp b/Source/core/rendering/RenderGrid.cpp
index 25760fdcf773452604f0bf301141ce6fe26144d6..8074c6a564969486e5b5f80e2a71ed624412df55 100644
--- a/Source/core/rendering/RenderGrid.cpp
+++ b/Source/core/rendering/RenderGrid.cpp
@@ -906,6 +906,8 @@ void RenderGrid::layoutGridItems()
     m_gridItemsOverflowingGridArea.resize(0);
 
     for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox()) {
+        child->setMayNeedInvalidation(true);
+
         // Because the grid area cannot be styled, we don't need to adjust
         // the grid breadth to account for 'box-sizing'.
         LayoutUnit oldOverrideContainingBlockContentLogicalWidth = child->hasOverrideContainingBlockLogicalWidth() ? child->overrideContainingBlockContentLogicalWidth() : LayoutUnit();