Less duplicated code between nodeAtPoint() in LayoutBox and LayoutBlock.

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

Index: third_party/WebKit/Source/core/layout/LayoutBlock.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlock.h b/third_party/WebKit/Source/core/layout/LayoutBlock.h
index 34dab449f2ab9d7254153154c9b31930beeca8b9..c2639f105e896008f3b576d1604d8c7b76248a71 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlock.h
+++ b/third_party/WebKit/Source/core/layout/LayoutBlock.h
@@ -397,14 +397,18 @@ private:
     TrackedLayoutBoxListHashSet* positionedObjectsInternal() const;
     TrackedLayoutBoxListHashSet* percentHeightDescendantsInternal() const;
 
-    Node* nodeForHitTest() const;
+    Node* nodeForHitTest() const final;
 
     // Returns true if the positioned movement-only layout succeeded.
     bool tryLayoutDoingPositionedMovementOnly();
 
     bool avoidsFloats() const override { return true; }
 
-    bool hitTestChildren(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction);
+    bool isInSelfHitTestingPhase(HitTestAction hitTestAction) const final
+    {
+        return hitTestAction == HitTestBlockBackground || hitTestAction == HitTestChildBlockBackground;
+    }
+    bool hitTestChildren(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
     // FIXME-BLOCKFLOW: Remove virtualizaion when all callers have moved to LayoutBlockFlow
     virtual bool hitTestFloats(HitTestResult&, const HitTestLocation&, const LayoutPoint&) { return false; }