Update {virtual,override} to follow C++11 style in cloud_print.

cloud_print/gcp20/prototype/cloud_print_url_request_context_getter.h

Index: cloud_print/gcp20/prototype/cloud_print_url_request_context_getter.h
diff --git a/cloud_print/gcp20/prototype/cloud_print_url_request_context_getter.h b/cloud_print/gcp20/prototype/cloud_print_url_request_context_getter.h
index 1fb52a62ddf3e5d645311ee4fb027aaca3cff1a2..3be249969cddea1535bd8759b2671460a9c6944c 100644
--- a/cloud_print/gcp20/prototype/cloud_print_url_request_context_getter.h
+++ b/cloud_print/gcp20/prototype/cloud_print_url_request_context_getter.h
@@ -18,13 +18,13 @@ class CloudPrintURLRequestContextGetter : public net::URLRequestContextGetter {
       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
   // URLRequestContextGetter implementation.
-  virtual net::URLRequestContext* GetURLRequestContext() override;
+  net::URLRequestContext* GetURLRequestContext() override;
 
-  virtual scoped_refptr<base::SingleThreadTaskRunner>
+  scoped_refptr<base::SingleThreadTaskRunner>
     GetNetworkTaskRunner() const override;
 
  private:
-  virtual ~CloudPrintURLRequestContextGetter();
+  ~CloudPrintURLRequestContextGetter() override;
 
   scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
   scoped_ptr<net::URLRequestContext> context_;