Standardize usage of virtual/override/final in media/

media/blink/null_encrypted_media_player_support.h

Index: media/blink/null_encrypted_media_player_support.h
diff --git a/media/blink/null_encrypted_media_player_support.h b/media/blink/null_encrypted_media_player_support.h
index 2fe538787724a4ba095ddde88a24f08f56f9d9d6..3b53ad24ab28f7857c0edede0f55915146c61527 100644
--- a/media/blink/null_encrypted_media_player_support.h
+++ b/media/blink/null_encrypted_media_player_support.h
@@ -19,16 +19,16 @@ class MEDIA_EXPORT NullEncryptedMediaPlayerSupport
   static scoped_ptr<EncryptedMediaPlayerSupport> Create(
       blink::WebMediaPlayerClient* client);
 
-  virtual ~NullEncryptedMediaPlayerSupport();
+  ~NullEncryptedMediaPlayerSupport() override;
 
   // Prefixed API methods.
-  virtual blink::WebMediaPlayer::MediaKeyException GenerateKeyRequest(
+  blink::WebMediaPlayer::MediaKeyException GenerateKeyRequest(
       blink::WebLocalFrame* frame,
       const blink::WebString& key_system,
       const unsigned char* init_data,
       unsigned init_data_length) override;
 
-  virtual blink::WebMediaPlayer::MediaKeyException AddKey(
+  blink::WebMediaPlayer::MediaKeyException AddKey(
       const blink::WebString& key_system,
       const unsigned char* key,
       unsigned key_length,
@@ -36,36 +36,34 @@ class MEDIA_EXPORT NullEncryptedMediaPlayerSupport
       unsigned init_data_length,
       const blink::WebString& session_id) override;
 
-  virtual blink::WebMediaPlayer::MediaKeyException CancelKeyRequest(
+  blink::WebMediaPlayer::MediaKeyException CancelKeyRequest(
       const blink::WebString& key_system,
       const blink::WebString& session_id) override;
 
-
   // Unprefixed API methods.
-  virtual void SetInitialContentDecryptionModule(
+  void SetInitialContentDecryptionModule(
       blink::WebContentDecryptionModule* initial_cdm) override;
-  virtual void SetContentDecryptionModule(
+  void SetContentDecryptionModule(
       blink::WebContentDecryptionModule* cdm) override;
-  virtual void SetContentDecryptionModule(
+  void SetContentDecryptionModule(
       blink::WebContentDecryptionModule* cdm,
       blink::WebContentDecryptionModuleResult result) override;
 
-
   // Callback factory and notification methods used by WebMediaPlayerImpl.
 
   // Creates a callback that Demuxers can use to signal that the content
   // requires a key. This method makes sure the callback returned can be safely
   // invoked from any thread.
-  virtual Demuxer::NeedKeyCB CreateNeedKeyCB() override;
+  Demuxer::NeedKeyCB CreateNeedKeyCB() override;
 
   // Creates a callback that renderers can use to set decryptor
   // ready callback. This method makes sure the callback returned can be safely
   // invoked from any thread.
-  virtual SetDecryptorReadyCB CreateSetDecryptorReadyCB() override;
+  SetDecryptorReadyCB CreateSetDecryptorReadyCB() override;
 
   // Called to inform this object that the media pipeline encountered
   // and handled a decryption error.
-  virtual void OnPipelineDecryptError() override;
+  void OnPipelineDecryptError() override;
 
  private:
   NullEncryptedMediaPlayerSupport();