Improve performance when calling PaintLayer::setNeedsRepaint()

third_party/WebKit/Source/core/layout/LayoutObject.h

Index: third_party/WebKit/Source/core/layout/LayoutObject.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutObject.h b/third_party/WebKit/Source/core/layout/LayoutObject.h
index ad307f07ecb94249f796294caeba6162f1622f7e..3226576e53e81bd33890a12fbce45f74a75810c3 100644
--- a/third_party/WebKit/Source/core/layout/LayoutObject.h
+++ b/third_party/WebKit/Source/core/layout/LayoutObject.h
@@ -1492,8 +1492,13 @@ protected:
     // owned by this object, including the object itself, LayoutText/LayoutInline line boxes, etc.,
     // not including children which will be invalidated normally during invalidateTreeIfNeeded() and
     // parts which are invalidated separately (e.g. scrollbars).
+    // The caller should ensure the enclosing layer has been setNeedsRepaint before calling this function.
     virtual void invalidateDisplayItemClients(const LayoutBoxModelObject& paintInvalidationContainer, PaintInvalidationReason) const;
 
+    // Sets enclosing layer needsRepaint, then calls invalidateDisplayItemClients().
+    // Should use this version when PaintInvalidationState is available.
+    void invalidateDisplayItemClientsWithPaintInvalidationState(const LayoutBoxModelObject& paintInvalidationContainer, const PaintInvalidationState&, PaintInvalidationReason) const;
+
     void setIsBackgroundAttachmentFixedObject(bool);
 
     void clearSelfNeedsOverflowRecalcAfterStyleChange() { m_bitfields.setSelfNeedsOverflowRecalcAfterStyleChange(false); }
@@ -1541,10 +1546,13 @@ private:
 
     inline void markContainerChainForPaintInvalidation();
 
-    inline void invalidateSelectionIfNeeded(const LayoutBoxModelObject&, PaintInvalidationReason);
+    inline void invalidateSelectionIfNeeded(const LayoutBoxModelObject& paintInvalidationContainer, const PaintInvalidationState&, PaintInvalidationReason);
 
     inline void invalidateContainerPreferredLogicalWidths();
 
+    void invalidatePaintIncludingNonSelfPaintingLayerDescendantsInternal(const LayoutBoxModelObject& paintInvalidationContainer);
+
+    // The caller should ensure the enclosing layer has been setNeedsRepaint before calling this function.
     void invalidatePaintOfPreviousPaintInvalidationRect(const LayoutBoxModelObject& paintInvalidationContainer, PaintInvalidationReason);
 
     LayoutRect previousSelectionRectForPaintInvalidation() const;