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

net/test/spawned_test_server/spawner_communicator.h

Index: net/test/spawned_test_server/spawner_communicator.h
diff --git a/net/test/spawned_test_server/spawner_communicator.h b/net/test/spawned_test_server/spawner_communicator.h
index 549ad9158c55e035a8285c4347db9d60d0e5eb77..ba8bfcab0e5cb687005ea6e602d6117b6c821d9d 100644
--- a/net/test/spawned_test_server/spawner_communicator.h
+++ b/net/test/spawned_test_server/spawner_communicator.h
@@ -61,7 +61,7 @@ class ScopedPortException;
 class SpawnerCommunicator : public net::URLRequest::Delegate {
  public:
   explicit SpawnerCommunicator(uint16 port);
-  virtual ~SpawnerCommunicator();
+  ~SpawnerCommunicator() override;
 
   // Starts an instance of the Python test server on the host/ machine.
   // If successfully started, returns true, setting |*port| to the port
@@ -100,8 +100,8 @@ class SpawnerCommunicator : public net::URLRequest::Delegate {
                                              std::string* data_received);
 
   // URLRequest::Delegate methods. Called on the IO thread.
-  virtual void OnResponseStarted(URLRequest* request) override;
-  virtual void OnReadCompleted(URLRequest* request, int num_bytes) override;
+  void OnResponseStarted(URLRequest* request) override;
+  void OnReadCompleted(URLRequest* request, int num_bytes) override;
 
   // Reads Result from the response. Called on the IO thread.
   void ReadResult(URLRequest* request);