replace OVERRIDE and FINAL with override and final in ash/

ash/shell/content_client/shell_content_browser_client.h

Index: ash/shell/content_client/shell_content_browser_client.h
diff --git a/ash/shell/content_client/shell_content_browser_client.h b/ash/shell/content_client/shell_content_browser_client.h
index abde21772799c64b8d8139ad32d40f80c4f58a91..324b6ae76e0e4eb7e6f3cb08483c60ce144e8c45 100644
--- a/ash/shell/content_client/shell_content_browser_client.h
+++ b/ash/shell/content_client/shell_content_browser_client.h
@@ -28,11 +28,11 @@ class ShellContentBrowserClient : public content::ContentBrowserClient {
 
   // Overridden from content::ContentBrowserClient:
   virtual content::BrowserMainParts* CreateBrowserMainParts(
-      const content::MainFunctionParams& parameters) OVERRIDE;
+      const content::MainFunctionParams& parameters) override;
   virtual net::URLRequestContextGetter* CreateRequestContext(
       content::BrowserContext* browser_context,
       content::ProtocolHandlerMap* protocol_handlers,
-      content::URLRequestInterceptorScopedVector request_interceptors) OVERRIDE;
+      content::URLRequestInterceptorScopedVector request_interceptors) override;
 
   content::ShellBrowserContext* browser_context();