Standardize usage of virtual/override/final in remoting/

remoting/host/fake_host_extension.h

 // Copyright 2014 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 REMOTING_HOST_FAKE_HOST_EXTENSION_H_
 #define REMOTING_HOST_FAKE_HOST_EXTENSION_H_
 
 #include <string>
 
 #include "remoting/host/host_extension.h"
 
 namespace remoting {
 
 class ClientSessionControl;
 class HostExtensionSession;
 
 namespace protocol {
 class ClientStub;
 }
 
 // |HostExtension| implementation that can report a specified capability, and
 // reports messages matching a specified type as having been handled.
 class FakeExtension : public HostExtension {
  public:
   FakeExtension(const std::string& message_type,
                 const std::string& capability);
-  virtual ~FakeExtension();
+  ~FakeExtension() override;
 
   // HostExtension interface.
-  virtual std::string capability() const override;
-  virtual scoped_ptr<HostExtensionSession> CreateExtensionSession(
+  std::string capability() const override;
+  scoped_ptr<HostExtensionSession> CreateExtensionSession(
       ClientSessionControl* client_session_control,
       protocol::ClientStub* client_stub) override;
 
   // Controls for testing.
   void set_steal_video_capturer(bool steal_video_capturer) {
     steal_video_capturer_ = steal_video_capturer;
   }
 
   // Accessors for testing.
   bool has_handled_message() const { return has_handled_message_; }
@@ skipping 26 matching lines @@
 
   // True if CreateExtensionSession() was called on this extension.
   bool was_instantiated_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeExtension);
 };
 
 } // namespace remoting
 
 #endif  // REMOTING_HOST_FAKE_HOST_EXTENSION_H_