Fix virtual/override/final usage in Source/core/editing/.

Source/core/editing/DeleteSelectionCommand.h

Index: Source/core/editing/DeleteSelectionCommand.h
diff --git a/Source/core/editing/DeleteSelectionCommand.h b/Source/core/editing/DeleteSelectionCommand.h
index 5cdb85cc0146a956408228ca984ad0a2f78a0033..570e1dc05fadedbc3e9d72f654f4978d1e774e0e 100644
--- a/Source/core/editing/DeleteSelectionCommand.h
+++ b/Source/core/editing/DeleteSelectionCommand.h
@@ -50,10 +50,10 @@ private:
     DeleteSelectionCommand(Document&, bool smartDelete, bool mergeBlocksAfterDelete, bool expandForSpecialElements, bool santizeMarkup);
     DeleteSelectionCommand(const VisibleSelection&, bool smartDelete, bool mergeBlocksAfterDelete, bool expandForSpecialElements, bool sanitizeMarkup);
 
-    virtual void doApply() override;
-    virtual EditAction editingAction() const override;
+    void doApply() override;
+    EditAction editingAction() const override;
 
-    virtual bool preservesTypingStyle() const override;
+    bool preservesTypingStyle() const override;
 
     void initializeStartEnd(Position&, Position&);
     void setStartingSelectionOnSmartDelete(const Position&, const Position&);
@@ -67,8 +67,8 @@ private:
     void calculateTypingStyleAfterDelete();
     void clearTransientState();
     void makeStylingElementsDirectChildrenOfEditableRootToPreventStyleLoss();
-    virtual void removeNode(PassRefPtrWillBeRawPtr<Node>, ShouldAssumeContentIsAlwaysEditable = DoNotAssumeContentIsAlwaysEditable) override;
-    virtual void deleteTextFromNode(PassRefPtrWillBeRawPtr<Text>, unsigned, unsigned) override;
+    void removeNode(PassRefPtrWillBeRawPtr<Node>, ShouldAssumeContentIsAlwaysEditable = DoNotAssumeContentIsAlwaysEditable) override;
+    void deleteTextFromNode(PassRefPtrWillBeRawPtr<Text>, unsigned, unsigned) override;
     void removeRedundantBlocks();
 
     bool m_hasSelectionToDelete;