Update more core classes to use OVERRIDE / FINAL when needed

Source/core/css/resolver/StyleResolver.h

Index: Source/core/css/resolver/StyleResolver.h
diff --git a/Source/core/css/resolver/StyleResolver.h b/Source/core/css/resolver/StyleResolver.h
index b8771f41e39ed3e5b9af4ce7e6f1df422aacd4e4..18324d17f23ae1c3fdf5cf194f13afb42b6370ce 100644
--- a/Source/core/css/resolver/StyleResolver.h
+++ b/Source/core/css/resolver/StyleResolver.h
@@ -100,11 +100,11 @@ struct CSSPropertyValue {
 };
 
 // This class selects a RenderStyle for a given element based on a collection of stylesheets.
-class StyleResolver : public FontSelectorClient {
+class StyleResolver FINAL : public FontSelectorClient {
     WTF_MAKE_NONCOPYABLE(StyleResolver); WTF_MAKE_FAST_ALLOCATED;
 public:
     explicit StyleResolver(Document&);
-    ~StyleResolver();
+    virtual ~StyleResolver();
 
     // FIXME: StyleResolver should not be keeping tree-walk state.
     // These should move to some global tree-walk state, or should be contained in a
@@ -230,7 +230,7 @@ public:
 
 private:
     // FontSelectorClient implementation.
-    virtual void fontsNeedUpdate(FontSelector*);
+    virtual void fontsNeedUpdate(FontSelector*) OVERRIDE;
 
 private:
     void initWatchedSelectorRules(const Vector<RefPtr<StyleRule> >& watchedSelectors);