Fix virtual/override/final usage in Source/modules/.

Source/modules/mediasource/MediaSource.h

 /*
  * 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 42 matching lines @@
     , public ActiveDOMObject {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(MediaSource);
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaSource);
 public:
     static const AtomicString& openKeyword();
     static const AtomicString& closedKeyword();
     static const AtomicString& endedKeyword();
 
     static MediaSource* create(ExecutionContext*);
-    virtual ~MediaSource();
+    ~MediaSource() override;
 
     // MediaSource.idl methods
     SourceBufferList* sourceBuffers() { return m_sourceBuffers.get(); }
     SourceBufferList* activeSourceBuffers() { return m_activeSourceBuffers.get(); }
     SourceBuffer* addSourceBuffer(const String& type, ExceptionState&);
     void removeSourceBuffer(SourceBuffer*, ExceptionState&);
     void setDuration(double, ExceptionState&);
     const AtomicString& readyState() const { return m_readyState; }
     void endOfStream(const AtomicString& error, ExceptionState&);
     void endOfStream(ExceptionState&);
     static bool isTypeSupported(const String& type);
 
     // HTMLMediaSource
-    virtual bool attachToElement(HTMLMediaElement*) override;
-    virtual void setWebMediaSourceAndOpen(PassOwnPtr<WebMediaSource>) override;
-    virtual void close() override;
-    virtual bool isClosed() const override;
-    virtual double duration() const override;
-    virtual PassRefPtrWillBeRawPtr<TimeRanges> buffered() const override;
-    virtual PassRefPtrWillBeRawPtr<TimeRanges> seekable() const override;
+    bool attachToElement(HTMLMediaElement*) override;
+    void setWebMediaSourceAndOpen(PassOwnPtr<WebMediaSource>) override;
+    void close() override;
+    bool isClosed() const override;
+    double duration() const override;
+    PassRefPtrWillBeRawPtr<TimeRanges> buffered() const override;
+    PassRefPtrWillBeRawPtr<TimeRanges> seekable() const override;
 #if !ENABLE(OILPAN)
-    virtual void refHTMLMediaSource() override { ref(); }
-    virtual void derefHTMLMediaSource() override { deref(); }
+    void refHTMLMediaSource() override { ref(); }
+    void derefHTMLMediaSource() override { deref(); }
 #endif
 
     // EventTarget interface
-    virtual const AtomicString& interfaceName() const override;
-    virtual ExecutionContext* executionContext() const override;
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const override;
 
     // ActiveDOMObject interface
-    virtual bool hasPendingActivity() const override;
-    virtual void stop() override;
+    bool hasPendingActivity() const override;
+    void stop() override;
 
     // URLRegistrable interface
-    virtual URLRegistry& registry() const override;
+    URLRegistry& registry() const override;
 
     // Used by SourceBuffer.
     void openIfInEndedState();
     bool isOpen() const;
     void setSourceBufferActive(SourceBuffer*);
 
     // Used by MediaSourceRegistry.
     void addedToRegistry();
     void removedFromRegistry();
 
@@ skipping 22 matching lines @@
 
     Member<SourceBufferList> m_sourceBuffers;
     Member<SourceBufferList> m_activeSourceBuffers;
 
     bool m_isAddedToRegistry;
 };
 
 } // namespace blink
 
 #endif // MediaSource_h