Make the SpawnerCommunicator destructor virtual since it inherits from net::URLRequest::Delegate

net/test/remote_test_server.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_TEST_REMOTE_TEST_SERVER_H_
 #define NET_TEST_REMOTE_TEST_SERVER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 11 matching lines @@
   // |document_root| must be a relative path under the root tree.
   RemoteTestServer(Type type,
                    const std::string& host,
                    const FilePath& document_root);
 
   // Initialize a HTTPS TestServer with a specific set of HTTPSOptions.
   // |document_root| must be a relative path under the root tree.
   RemoteTestServer(const HTTPSOptions& https_options,
                    const FilePath& document_root);
 
-  ~RemoteTestServer();
+  virtual ~RemoteTestServer();
 
   // Starts the Python test server on the host, instead of on the device.
   bool Start() WARN_UNUSED_RESULT;
 
   // Stops the Python test server that is running on the host machine.
   bool Stop();
 
  private:
   bool Init(const FilePath& document_root);
 
   // Helper to start and stop instances of the Python test server that runs on
   // the host machine.
   scoped_ptr<SpawnerCommunicator> spawner_communicator_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteTestServer);
 };
 
 }  // namespace net
 
 #endif  // NET_TEST_REMOTE_TEST_SERVER_H_