Fix up -Winconsistent-missing-override

include/xml/SkXMLWriter.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkXMLWriter_DEFINED
 #define SkXMLWriter_DEFINED
 
@@ skipping 47 matching lines @@
 private:
     bool fDoEscapeMarkup;
     // illegal
     SkXMLWriter& operator=(const SkXMLWriter&);
 };
 
 class SkXMLStreamWriter : public SkXMLWriter {
 public:
     SkXMLStreamWriter(SkWStream*);
     virtual ~SkXMLStreamWriter();
-    virtual void    writeHeader();
+    void writeHeader() override;
     SkDEBUGCODE(static void UnitTest();)
 
 protected:
     void onStartElementLen(const char elem[], size_t length) override;
     void onEndElement() override;
     void onAddAttributeLen(const char name[], const char value[], size_t length) override;
     void onAddText(const char text[], size_t length) override;
 
 private:
     SkWStream&      fStream;
 };
 
 class SkXMLParserWriter : public SkXMLWriter {
 public:
     SkXMLParserWriter(SkXMLParser*);
     virtual ~SkXMLParserWriter();
 protected:
-    virtual void onStartElementLen(const char elem[], size_t length);
-    virtual void onEndElement();
-    virtual void onAddAttributeLen(const char name[], const char value[], size_t length);
-    virtual void onAddText(const char text[], size_t length) override;
+    void onStartElementLen(const char elem[], size_t length) override;
+    void onEndElement() override;
+    void onAddAttributeLen(const char name[], const char value[], size_t length) override;
+    void onAddText(const char text[], size_t length) override;
 private:
     SkXMLParser&        fParser;
 };
 
 
 #endif