Fix virtual/override/final usage in Source/core/{animation,css,style}/.

Source/core/css/RemoteFontFaceSource.h

Index: Source/core/css/RemoteFontFaceSource.h
diff --git a/Source/core/css/RemoteFontFaceSource.h b/Source/core/css/RemoteFontFaceSource.h
index 1c9b8cd26421c6f5bd2ea07878de18d435ca38a2..3f4d97286155ac73b47cf836977fcc8c524c0f1c 100644
--- a/Source/core/css/RemoteFontFaceSource.h
+++ b/Source/core/css/RemoteFontFaceSource.h
@@ -16,27 +16,27 @@ class FontLoader;
 class RemoteFontFaceSource final : public CSSFontFaceSource, public FontResourceClient {
 public:
     explicit RemoteFontFaceSource(FontResource*, PassRefPtrWillBeRawPtr<FontLoader>);
-    virtual ~RemoteFontFaceSource();
+    ~RemoteFontFaceSource() override;
 
-    virtual FontResource* resource() override { return m_font.get(); }
-    virtual bool isLoading() const override;
-    virtual bool isLoaded() const override;
-    virtual bool isValid() const override;
+    FontResource* resource() override { return m_font.get(); }
+    bool isLoading() const override;
+    bool isLoaded() const override;
+    bool isValid() const override;
 
     void beginLoadIfNeeded() override;
 
-    virtual void didStartFontLoad(FontResource*) override;
-    virtual void fontLoaded(FontResource*) override;
-    virtual void fontLoadWaitLimitExceeded(FontResource*) override;
+    void didStartFontLoad(FontResource*) override;
+    void fontLoaded(FontResource*) override;
+    void fontLoadWaitLimitExceeded(FontResource*) override;
 
     // For UMA reporting
-    virtual bool hadBlankText() override { return m_histograms.hadBlankText(); }
+    bool hadBlankText() override { return m_histograms.hadBlankText(); }
     void paintRequested() { m_histograms.fallbackFontPainted(); }
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
-    virtual PassRefPtr<SimpleFontData> createFontData(const FontDescription&) override;
+    PassRefPtr<SimpleFontData> createFontData(const FontDescription&) override;
     PassRefPtr<SimpleFontData> createLoadingFallbackFontData(const FontDescription&);
     void pruneTable();