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

content/renderer/media/speech_recognition_audio_sink_unittest.cc

Index: content/renderer/media/speech_recognition_audio_sink_unittest.cc
diff --git a/content/renderer/media/speech_recognition_audio_sink_unittest.cc b/content/renderer/media/speech_recognition_audio_sink_unittest.cc
index cb98dc9ab52c45223c8e23bb4d781662631b9562..4366309f1ed7ac4d52cc5fd80ad28aaea08add27 100644
--- a/content/renderer/media/speech_recognition_audio_sink_unittest.cc
+++ b/content/renderer/media/speech_recognition_audio_sink_unittest.cc
@@ -65,8 +65,8 @@ class MockSyncSocket : public base::SyncSocket {
         on_send_cb_(on_send_cb),
         in_failure_mode_(false) {}
 
-  virtual size_t Send(const void* buffer, size_t length) override;
-  virtual size_t Receive(void* buffer, size_t length) override;
+  size_t Send(const void* buffer, size_t length) override;
+  size_t Receive(void* buffer, size_t length) override;
 
   // When |in_failure_mode_| == true, the socket fails to send.
   void SetFailureMode(bool in_failure_mode) {