Remove dynamic MediaControlCastButtonElement::shadowPseudoId.

third_party/WebKit/Source/core/html/shadow/MediaControlElements.h

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 305 matching lines @@
 
   bool hasOverflowButton() override { return true; }
 
   // This will show a cast button if it is not covered by another element.
   // This MUST be called for cast button elements that are overlay elements.
   void tryShowOverlay();
 
  private:
   explicit MediaControlCastButtonElement(MediaControls&, bool isOverlayButton);
 
-  const AtomicString& shadowPseudoId() const override;
   void defaultEventHandler(Event*) override;
   bool keepEventInNode(Event*) override;
 
   bool m_isOverlayButton;
 
   // This is used for UMA histogram (Cast.Sender.Overlay). New values should
   // be appended only and must be added before |Count|.
   enum class CastOverlayMetrics {
     Created = 0,
     Shown,
@@ skipping 43 matching lines @@
  public:
   static MediaControlCurrentTimeDisplayElement* create(MediaControls&);
 
  private:
   explicit MediaControlCurrentTimeDisplayElement(MediaControls&);
 };
 
 }  // namespace blink
 
 #endif  // MediaControlElements_h