Standardize usage of virtual/override/final in chrome/renderer/

chrome/renderer/extensions/cast_streaming_native_handler.h

 // Copyright 2013 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 CHROME_RENDERER_EXTENSIONS_CAST_STREAMING_NATIVE_HANDLER_H_
 #define CHROME_RENDERER_EXTENSIONS_CAST_STREAMING_NATIVE_HANDLER_H_
 
 #include <map>
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "extensions/renderer/object_backed_native_handler.h"
 #include "extensions/renderer/scoped_persistent.h"
 #include "v8/include/v8.h"
 
 class CastRtpStream;
 class CastUdpTransport;
 
 namespace base {
 class BinaryValue;
 class DictionaryValue;
 }
 
 namespace extensions {
 
 // Native code that handle chrome.webrtc custom bindings.
 class CastStreamingNativeHandler : public ObjectBackedNativeHandler {
  public:
   explicit CastStreamingNativeHandler(ScriptContext* context);
-  virtual ~CastStreamingNativeHandler();
+  ~CastStreamingNativeHandler() override;
 
  private:
   void CreateCastSession(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
   void DestroyCastRtpStream(
       const v8::FunctionCallbackInfo<v8::Value>& args);
   void CreateParamsCastRtpStream(
       const v8::FunctionCallbackInfo<v8::Value>& args);
   void GetSupportedParamsCastRtpStream(
@@ skipping 53 matching lines @@
   RtpStreamCallbackMap get_stats_callbacks_;
 
   base::WeakPtrFactory<CastStreamingNativeHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastStreamingNativeHandler);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_CAST_STREAMING_NATIVE_HANDLER_H_