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

net/url_request/url_request_http_job_unittest.cc

Index: net/url_request/url_request_http_job_unittest.cc
diff --git a/net/url_request/url_request_http_job_unittest.cc b/net/url_request/url_request_http_job_unittest.cc
index c47c819281a238732f405324538f90153ee106af..5ca046fe9c158bdc78f5d3822e8e9f1706fe1387 100644
--- a/net/url_request/url_request_http_job_unittest.cc
+++ b/net/url_request/url_request_http_job_unittest.cc
@@ -227,7 +227,7 @@ class MockCreateHelper : public WebSocketHandshakeStreamBase::CreateHelper {
  public:
   // GoogleMock does not appear to play nicely with move-only types like
   // scoped_ptr, so this forwarding method acts as a workaround.
-  virtual WebSocketHandshakeStreamBase* CreateBasicStream(
+  WebSocketHandshakeStreamBase* CreateBasicStream(
       scoped_ptr<ClientSocketHandle> connection,
       bool using_proxy) override {
     // Discard the arguments since we don't need them anyway.