Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/[css|rendering|clipboard]

Source/core/css/CSSImportRule.h

Index: Source/core/css/CSSImportRule.h
diff --git a/Source/core/css/CSSImportRule.h b/Source/core/css/CSSImportRule.h
index aefd40f9dbb34554546d116b5422d30711764d6e..22e779d9ca11c5a0ef8d3e94013247703eee503f 100644
--- a/Source/core/css/CSSImportRule.h
+++ b/Source/core/css/CSSImportRule.h
@@ -30,7 +30,7 @@ namespace blink {
 class MediaList;
 class StyleRuleImport;
 
-class CSSImportRule FINAL : public CSSRule {
+class CSSImportRule final : public CSSRule {
 public:
     static PassRefPtrWillBeRawPtr<CSSImportRule> create(StyleRuleImport* rule, CSSStyleSheet* sheet)
     {
@@ -39,15 +39,15 @@ public:
 
     virtual ~CSSImportRule();
 
-    virtual CSSRule::Type type() const OVERRIDE { return IMPORT_RULE; }
-    virtual String cssText() const OVERRIDE;
-    virtual void reattach(StyleRuleBase*) OVERRIDE;
+    virtual CSSRule::Type type() const override { return IMPORT_RULE; }
+    virtual String cssText() const override;
+    virtual void reattach(StyleRuleBase*) override;
 
     String href() const;
     MediaList* media() const;
     CSSStyleSheet* styleSheet() const;
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     CSSImportRule(StyleRuleImport*, CSSStyleSheet*);