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

Source/core/css/StyleRuleImport.h

Index: Source/core/css/StyleRuleImport.h
diff --git a/Source/core/css/StyleRuleImport.h b/Source/core/css/StyleRuleImport.h
index 1ea43fbc761277fb465c5dcc48f699cfc7f0cb95..5a82d9490524f6b860bec1bc9139fa28839b5945 100644
--- a/Source/core/css/StyleRuleImport.h
+++ b/Source/core/css/StyleRuleImport.h
@@ -58,11 +58,11 @@ private:
     // FIXME: inherit from StyleSheetResourceClient directly to eliminate raw back pointer, as there are no space savings in this.
     // NOTE: We put the StyleSheetResourceClient in a member instead of inheriting from it
     // to avoid adding a vptr to StyleRuleImport.
-    class ImportedStyleSheetClient FINAL : public StyleSheetResourceClient {
+    class ImportedStyleSheetClient final : public StyleSheetResourceClient {
     public:
         ImportedStyleSheetClient(StyleRuleImport* ownerRule) : m_ownerRule(ownerRule) { }
         virtual ~ImportedStyleSheetClient() { }
-        virtual void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource* sheet) OVERRIDE
+        virtual void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource* sheet) override
         {
             m_ownerRule->setCSSStyleSheet(href, baseURL, charset, sheet);
         }