replace OVERRIDE and FINAL with override and final in extensions/

extensions/renderer/extension_helper.cc

Index: extensions/renderer/extension_helper.cc
diff --git a/extensions/renderer/extension_helper.cc b/extensions/renderer/extension_helper.cc
index e9da0f58ea5c8ee461d90fb034212e87a2c72220..3e8018bd37ca9c910323482a57f35a0c0bfc6bed 100644
--- a/extensions/renderer/extension_helper.cc
+++ b/extensions/renderer/extension_helper.cc
@@ -47,7 +47,7 @@ class ViewAccumulator : public content::RenderViewVisitor {
   std::vector<content::RenderView*> views() { return views_; }
 
   // Returns false to terminate the iteration.
-  virtual bool Visit(content::RenderView* render_view) OVERRIDE {
+  virtual bool Visit(content::RenderView* render_view) override {
     ExtensionHelper* helper = ExtensionHelper::Get(render_view);
     if (!ViewTypeMatches(helper->view_type(), view_type_))
       return true;