Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/workers

Source/core/workers/WorkerNavigator.h

Index: Source/core/workers/WorkerNavigator.h
diff --git a/Source/core/workers/WorkerNavigator.h b/Source/core/workers/WorkerNavigator.h
index 79fccd13099582da93ef69a685baf53bcffdbf8d..b214bbbc1203966eceb256b48a2a7a1c542b68a4 100644
--- a/Source/core/workers/WorkerNavigator.h
+++ b/Source/core/workers/WorkerNavigator.h
@@ -38,7 +38,7 @@
 
 namespace blink {
 
-class WorkerNavigator FINAL : public RefCountedWillBeGarbageCollectedFinalized<WorkerNavigator>, public ScriptWrappable, public NavigatorCPU, public NavigatorID, public NavigatorOnLine, public WillBeHeapSupplementable<WorkerNavigator> {
+class WorkerNavigator final : public RefCountedWillBeGarbageCollectedFinalized<WorkerNavigator>, public ScriptWrappable, public NavigatorCPU, public NavigatorID, public NavigatorOnLine, public WillBeHeapSupplementable<WorkerNavigator> {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(WorkerNavigator);
 public:
@@ -48,7 +48,7 @@ public:
     }
     virtual ~WorkerNavigator();
 
-    virtual String userAgent() const OVERRIDE;
+    virtual String userAgent() const override;
 
     void trace(Visitor*);