Fix virtual/override/final usage in Source/core/{fetch,loader,streams,xmlhttprequest}/.

Source/core/fetch/RawResourceTest.cpp

 /*
  * Copyright (c) 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 66 matching lines @@
     ResourceResponse response;
     response.setHTTPStatusCode(304);
     newResource->responseReceived(response, nullptr);
     EXPECT_EQ(memoryCache()->resourceForURL(KURL(ParsedURLString, "data:text/html,")), oldResource.get());
     EXPECT_EQ(oldResource.get(), newResource.get());
     EXPECT_NE(newResource.get(), newResourcePointer);
 }
 
 class DummyClient : public RawResourceClient {
 public:
-    DummyClient() : m_called(false) { }
-    virtual ~DummyClient() { }
+    DummyClient() : m_called(false) {}
+    ~DummyClient() override {}
 
     // ResourceClient implementation.
     virtual void notifyFinished(Resource* resource)
     {
         m_called = true;
     }
 
     bool called() { return m_called; }
 private:
     bool m_called;
 };
 
 // This client adds another client when notified.
 class AddingClient : public RawResourceClient {
 public:
     AddingClient(DummyClient* client, Resource* resource)
         : m_dummyClient(client)
         , m_resource(resource)
-        , m_removeClientTimer(this, &AddingClient::removeClient) { }
+        , m_removeClientTimer(this, &AddingClient::removeClient) {}
 
-    virtual ~AddingClient() { }
+    ~AddingClient() override {}
 
     // ResourceClient implementation.
     virtual void notifyFinished(Resource* resource)
     {
         // First schedule an asynchronous task to remove the client.
         // We do not expect the client to be called.
         m_removeClientTimer.startOneShot(0, FROM_HERE);
         resource->addClient(m_dummyClient);
     }
     void removeClient(Timer<AddingClient>* timer)
@@ skipping 23 matching lines @@
     testing::runPendingTasks();
     raw->removeClient(addingClient.get());
     EXPECT_FALSE(dummyClient->called());
     EXPECT_FALSE(raw->hasClients());
 }
 
 // This client removes another client when notified.
 class RemovingClient : public RawResourceClient {
 public:
     RemovingClient(DummyClient* client)
-        : m_dummyClient(client) { }
+        : m_dummyClient(client) {}
 
-    virtual ~RemovingClient() { }
+    ~RemovingClient() override {}
 
     // ResourceClient implementation.
     virtual void notifyFinished(Resource* resource)
     {
         resource->removeClient(m_dummyClient);
         resource->removeClient(this);
     }
 private:
     DummyClient* m_dummyClient;
 };
@@ skipping 11 matching lines @@
 
     OwnPtr<DummyClient> dummyClient = adoptPtr(new DummyClient());
     OwnPtr<RemovingClient> removingClient = adoptPtr(new RemovingClient(dummyClient.get()));
     raw->addClient(dummyClient.get());
     raw->addClient(removingClient.get());
     testing::runPendingTasks();
     EXPECT_FALSE(raw->hasClients());
 }
 
 } // namespace blink